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Drivetrain & Sports Gearbox Parts


Optimize Your Drivetrain: More Power, More Pleasure

At Optimiz Access, we offer custom-tailored solutions for a more efficient, direct, and responsive drivetrain. Whether you are aiming to put power down on the track or achieve sharper gear selection in daily driving, upgrading your transmission system unlocks the full potential of your sports vehicle.

Key benefits of an optimized drivetrain: faster and more precise gear shifts for dynamic driving, improved torque distribution for maximum traction, enhanced component reliability, and custom setups suited to all driving styles.

Essential Components for Gearboxes and Differentials

Our lineup brings together all the essential precision parts needed to maximize power transfer to the road:

  • Clutches & Flywheels – Reinforced clutch kits, single-mass race flywheels, and high-friction materials built to handle high torque output.
  • LSDs & Differentials – Limited-slip differentials designed to eliminate wheelspin and maximize exit traction.
  • Shifters & Short Shifters – Precision short-throw shifters delivering crisp, rapid gear engagements.
  • Final Drive Gears – Shorter ring and pinion gear sets providing explosive acceleration and mid-range response.
  • Gearbox Oils & Bearings – High-performance synthetic gear oils and heavy-duty bearings engineered to protect gears under load.

Benchmark Brands and Trusted Partners

We work with the most respected motorsport manufacturers in the industry: CAE Racing, Sadev, Quaife, 4Tech Shifter, Helix, SACHS Performance, and TTV Racing. We also stock OEM factory parts to cover all your routine maintenance, servicing, and drivetrain overhauls.

Why Choose Optimiz Access for Your Drivetrain?

Since 2010, Optimiz Access has specialized in the custom upgrading and maintenance of sports and premium vehicles. By relying on us, you gain expert technical advice, high-precision components, and professional installation in our workshop in northern France (Hauts-de-France) — near Lille, Valenciennes, Cambrai, Arras, Seclin, Douai, and Saint-Quentin. We ensure strict quality control along with fast worldwide shipping.

Gear Up and Boost Your Sports Car's Traction Today

Don't let your engine's power go to waste. Trust the expertise of Optimiz Access, select your transmission hardware today, and take advantage of our fast dispatch to get your vehicle build underway.

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  • Categories: Bearings
  • Categories: Short Bridge
copy of Roulement avant Clio 3 RS - Megane 3 RS - Megane 4 RScopy of Roulement avant Clio 3 RS - Megane 3 RS - Megane 4 RS
      Roulement avant Clio 3 RS - Megane 3 RS - Megane 4 RS
      €304.88Price
      copy of Roulement avant Clio 3 RS - Megane 3 RS - Megane 4 RScopy of Roulement avant Clio 3 RS - Megane 3 RS - Megane 4 RS
          Roulement avant Clio 3 RS - Megane 3 RS - Megane 4 RS
          €304.88Price
          Uprated front wheel hub bearing for Renault Clio 3 RS and Megane 3 / 4 RS, SKUs: 7711160425 8200416590.Front Wheel Hub Bearing | Renault Clio 3 RS - Megane 3 / 4 RS
              Prevent low-frequency cabin droning, structural wheel hub play, and the degradation of your steering accuracy under heavy cornering loads. The heavy-duty Front Wheel Hub Bearing for Clio 3 RS, Megane 3 RS, and Megane 4 RS secures the structural alignment of your front axle...
              €123.42Price
              Uprated front wheel hub bearing for Renault Clio 3 RS and Megane 3 / 4 RS, SKUs: 7711160425 8200416590.Front Wheel Hub Bearing | Renault Clio 3 RS - Megane 3 / 4 RS
                  Prevent low-frequency cabin droning, structural wheel hub play, and the degradation of your steering accuracy under heavy cornering loads. The heavy-duty Front Wheel Hub Bearing for Clio 3 RS, Megane 3 RS, and Megane 4 RS secures the structural alignment of your front axle...
                  €123.42Price
                  Roulement différentiel côté grand cardan Boite TL4 Clio 3 RS
                      Optimize the performance of your Clio 3 RS with the genuine Renault differential bearing on the large driveshaft side! <p style="margin:1rem 0px;color:#1f1f1f;font-family:'Google Sans', 'Helvetica Neue',...
                      €55.55Price
                      Roulement différentiel côté grand cardan Boite TL4 Clio 3 RS
                          Optimize the performance of your Clio 3 RS with the genuine Renault differential bearing on the large driveshaft side! <p style="margin:1rem 0px;color:#1f1f1f;font-family:'Google Sans', 'Helvetica Neue',...
                          €55.55Price
                          Roulement différentiel côté petit cardan Boite TL4 Clio 3 RS
                              Roulement différentiel côté petit cardan Boite TL4 Clio 3 RS
                              €37.96Price
                              Roulement différentiel côté petit cardan Boite TL4 Clio 3 RS
                                  Roulement différentiel côté petit cardan Boite TL4 Clio 3 RS
                                  €37.96Price
                                  Roulement arbre secondaire côté 6ème Boite TL4 Clio 3 RS
                                      Roulement arbre secondaire côté 6ème Boite TL4 Clio 3 RS
                                      €32.11Price
                                      Roulement arbre secondaire côté 6ème Boite TL4 Clio 3 RS
                                          Roulement arbre secondaire côté 6ème Boite TL4 Clio 3 RS
                                          €32.11Price
                                          Roulement arbre secondaire côté embrayage Boite TL4 Clio 3 RS
                                              Original RENAULT secondary shaft bearing (clutch side) for TL4 type gearboxes fitted to Renault Clio 3 RS vehicles. An essential part for the proper functioning of your transmission. Discover other gearbox bearings in the related products section at the bottom of the page.
                                              €60.40Price
                                              Roulement arbre secondaire côté embrayage Boite TL4 Clio 3 RS
                                                  Original RENAULT secondary shaft bearing (clutch side) for TL4 type gearboxes fitted to Renault Clio 3 RS vehicles. An essential part for the proper functioning of your transmission. Discover other gearbox bearings in the related products section at the bottom of the page.
                                                  €60.40Price
                                                  En Stock
                                                  €10.49 Price
                                                  En Stock
                                                  €10.49 Price
                                                  Cage aiguille pignon fou 6ème Boite TL4 Clio 3 RS
                                                      Ensure your transmission's longevity with this genuine Renault needle cage for the 6th speed gear . Specifically designed for the TL4 gearbox of your Clio 3 RS , this essential engine component prevents whining noises and premature failure. Do not risk your gearbox integrity with...
                                                      €10.49Price
                                                      Cage aiguille pignon fou 6ème Boite TL4 Clio 3 RS
                                                          Ensure your transmission's longevity with this genuine Renault needle cage for the 6th speed gear . Specifically designed for the TL4 gearbox of your Clio 3 RS , this essential engine component prevents whining noises and premature failure. Do not risk your gearbox integrity with...
                                                          €10.49Price
                                                          En Stock
                                                          €29.71 Price
                                                          En Stock
                                                          €29.71 Price
                                                          Reinforced input shaft ball bearing (6th gear side) for Renault Clio 3 RS 6-speed manual TL4 gearboxes.
                                                              Do not risk a persistent transmission whine, severe internal gear mesh destruction, or a catastrophic input shaft snap under heavy loads. The premium Roulement arbre primaire côté 6ème boite TL4 Clio 3 RS is the critical factory-spec replacement bearing required to restore...
                                                              €29.71Price
                                                              Reinforced input shaft ball bearing (6th gear side) for Renault Clio 3 RS 6-speed manual TL4 gearboxes.
                                                                  Do not risk a persistent transmission whine, severe internal gear mesh destruction, or a catastrophic input shaft snap under heavy loads. The premium Roulement arbre primaire côté 6ème boite TL4 Clio 3 RS is the critical factory-spec replacement bearing required to restore...
                                                                  €29.71Price
                                                                  Roulement arbre primaire côté embrayage boite TL4 Clio 3 RS
                                                                      Roulement arbre primaire côté embrayage boite TL4 Clio 3 RS
                                                                      €28.99Price
                                                                      Roulement arbre primaire côté embrayage boite TL4 Clio 3 RS
                                                                          Roulement arbre primaire côté embrayage boite TL4 Clio 3 RS
                                                                          €28.99Price
                                                                          En Stock
                                                                          €12.64 Price
                                                                          En Stock
                                                                          €12.64 Price
                                                                          Vis fixation pignon arbre secondaire JC5 JR5
                                                                              Secure your transmission with this genuine Renault pinion fixing bolt . Essential for maintaining the secondary shaft on JC5 and JR5 type gearboxes, this component is critical for the reliability of your Renault Clio 2 RS or Twingo 2 RS . Do not take any risks with used...
                                                                              €12.64Price
                                                                              Vis fixation pignon arbre secondaire JC5 JR5
                                                                                  Secure your transmission with this genuine Renault pinion fixing bolt . Essential for maintaining the secondary shaft on JC5 and JR5 type gearboxes, this component is critical for the reliability of your Renault Clio 2 RS or Twingo 2 RS . Do not take any risks with used...
                                                                                  €12.64Price
                                                                                  Roulement d'arbre primaire (carter 5ème) Twingo RS et R1
                                                                                      Roulement d'arbre primaire (carter 5ème) Twingo RS et R1
                                                                                      €24.59Price
                                                                                      Roulement d'arbre primaire (carter 5ème) Twingo RS et R1
                                                                                          Roulement d'arbre primaire (carter 5ème) Twingo RS et R1
                                                                                          €24.59Price
                                                                                          En Stock
                                                                                          €55.55 Price
                                                                                          En Stock
                                                                                          €55.55 Price
                                                                                          Roulement d'arbre JB JC
                                                                                              Roulement d'arbre secondaire (carter 5ème) Twingo RS et R1 et servant egalement en tant que  Roulement d'arbre primaire Clio 2 RS
                                                                                              €55.55Price
                                                                                              Roulement d'arbre JB JC
                                                                                                  Roulement d'arbre secondaire (carter 5ème) Twingo RS et R1 et servant egalement en tant que  Roulement d'arbre primaire Clio 2 RS
                                                                                                  €55.55Price
                                                                                                  En Stock
                                                                                                  €55.55 Price
                                                                                                  En Stock
                                                                                                  €55.55 Price
                                                                                                  Roulement d'arbre secondaire Twingo RS et R1
                                                                                                      Roulement d'arbre secondaire (côté embrayage)Twingo RS et R1
                                                                                                      €55.55Price
                                                                                                      Roulement d'arbre secondaire Twingo RS et R1
                                                                                                          Roulement d'arbre secondaire (côté embrayage)Twingo RS et R1
                                                                                                          €55.55Price
                                                                                                          En Stock
                                                                                                          €77.23 Price
                                                                                                          En Stock
                                                                                                          €77.23 Price
                                                                                                          Roulement Arbre primaire (carter embrayage) pour boite à crabot Gr N
                                                                                                              Primary Shaft Bearing SADEV ST66 (0103034) Ensure the optimal performance of your SADEV ST66 gearbox with this genuine Renault Sport primary shaft bearing. Designed for the Clio Gr N, it guarantees precise and reliable operation. Essential for maintaining your transmission's performance.
                                                                                                              €77.23Price
                                                                                                              Roulement Arbre primaire (carter embrayage) pour boite à crabot Gr N
                                                                                                                  Primary Shaft Bearing SADEV ST66 (0103034) Ensure the optimal performance of your SADEV ST66 gearbox with this genuine Renault Sport primary shaft bearing. Designed for the Clio Gr N, it guarantees precise and reliable operation. Essential for maintaining your transmission's performance.
                                                                                                                  €77.23Price
                                                                                                                  Roulement de Differentiel pour boite à crabot Gr N et ST75-14
                                                                                                                      Roulement de Différentiel pour boite à crabot Gr N Repère 5 sur l’éclate de la clio gr N
                                                                                                                      €58.80Price
                                                                                                                      Roulement de Differentiel pour boite à crabot Gr N et ST75-14
                                                                                                                          Roulement de Différentiel pour boite à crabot Gr N Repère 5 sur l’éclate de la clio gr N
                                                                                                                          €58.80Price
                                                                                                                          En Stock
                                                                                                                          €293.65 Price
                                                                                                                          En Stock
                                                                                                                          €293.65 Price
                                                                                                                          Kit Roulements Boite à crabots Clio Gr NKit Roulements Boite à crabots Clio Gr N
                                                                                                                              Kit comprenant: - Les 2 roulements d'autobloquants - Les 2 roulements d'arbre primaire - Les 2 roulements d'arbre secondaire Ne comprend pas: - Les cages à Aiguilles
                                                                                                                              €293.65Price
                                                                                                                              Kit Roulements Boite à crabots Clio Gr NKit Roulements Boite à crabots Clio Gr N
                                                                                                                                  Kit comprenant: - Les 2 roulements d'autobloquants - Les 2 roulements d'arbre primaire - Les 2 roulements d'arbre secondaire Ne comprend pas: - Les cages à Aiguilles
                                                                                                                                  €293.65Price
                                                                                                                                  En Stock
                                                                                                                                  €75.46 Price
                                                                                                                                  En Stock
                                                                                                                                  €75.46 Price
                                                                                                                                  Roulement avant Clio 2 RS et Gr N
                                                                                                                                      Roulement avant Clio Gr N Véritable produit Renault Sport Référence: 6000072543
                                                                                                                                      €75.46Price
                                                                                                                                      Roulement avant Clio 2 RS et Gr N
                                                                                                                                          Roulement avant Clio Gr N Véritable produit Renault Sport Référence: 6000072543
                                                                                                                                          €75.46Price
                                                                                                                                          En Stock
                                                                                                                                          €80.82 Price
                                                                                                                                          En Stock
                                                                                                                                          €80.82 Price
                                                                                                                                          Roulement de Roue avant Twingo RS y compris R1 et R2Roulement de Roue avant Twingo RS y compris R1 et R2
                                                                                                                                              Roulement de Roue avant Twingo RS y compris R1 et R2 7711162816
                                                                                                                                              €80.82Price
                                                                                                                                              Roulement de Roue avant Twingo RS y compris R1 et R2Roulement de Roue avant Twingo RS y compris R1 et R2
                                                                                                                                                  Roulement de Roue avant Twingo RS y compris R1 et R2 7711162816
                                                                                                                                                  €80.82Price
                                                                                                                                                  Circlips de roulement de roue avant Twingo RS R1 et R2
                                                                                                                                                      Circlips de roulement de roue avant Twingo RS R1 et R2
                                                                                                                                                      €1.58Price
                                                                                                                                                      Circlips de roulement de roue avant Twingo RS R1 et R2
                                                                                                                                                          Circlips de roulement de roue avant Twingo RS R1 et R2
                                                                                                                                                          €1.58Price
                                                                                                                                                          En Stock
                                                                                                                                                          €38.75 Price
                                                                                                                                                          En Stock
                                                                                                                                                          €38.75 Price
                                                                                                                                                          SADEV Secondary Shaft Nut - Renault Clio 3 X85 CupSADEV Secondary Shaft Nut - Renault Clio 3 X85 Cup
                                                                                                                                                              Secure your transmission with the genuine SADEV secondary shaft nut , a critical component for the reliability of your Renault Clio 3 X85 Cup . Engineered to withstand the extreme stresses of motorsport, this nut ensures perfect gear retention during intensive shifting. As the exclusive SADEV parts distributor for Clio 2 Cup, Clio 3...
                                                                                                                                                              €38.75Price
                                                                                                                                                              SADEV Secondary Shaft Nut - Renault Clio 3 X85 CupSADEV Secondary Shaft Nut - Renault Clio 3 X85 Cup
                                                                                                                                                                  Secure your transmission with the genuine SADEV secondary shaft nut , a critical component for the reliability of your Renault Clio 3 X85 Cup . Engineered to withstand the extreme stresses of motorsport, this nut ensures perfect gear retention during intensive shifting. As the exclusive SADEV parts distributor for Clio 2 Cup, Clio 3...
                                                                                                                                                                  €38.75Price
                                                                                                                                                                  SADEV 12/58 Final Drive Kit ST75 Gearbox Renault Clio 3 X85 CupSADEV 12/58 Final Drive Kit ST75 Gearbox Renault Clio 3 X85 Cup
                                                                                                                                                                      The SADEV 12x58 Final Drive Kit (12-tooth Secondary Shaft F1908058 and 58-tooth Crown Wheel F1908059) is the ultimate transmission part for your Renault Clio 3 X85 Cup equipped with the **SADEV ST75** sequential gearbox. Choosing this final drive ensures maximum acceleration and...
                                                                                                                                                                      €2,211.77Price
                                                                                                                                                                      SADEV 12/58 Final Drive Kit ST75 Gearbox Renault Clio 3 X85 CupSADEV 12/58 Final Drive Kit ST75 Gearbox Renault Clio 3 X85 Cup
                                                                                                                                                                          The SADEV 12x58 Final Drive Kit (12-tooth Secondary Shaft F1908058 and 58-tooth Crown Wheel F1908059) is the ultimate transmission part for your Renault Clio 3 X85 Cup equipped with the **SADEV ST75** sequential gearbox. Choosing this final drive ensures maximum acceleration and...
                                                                                                                                                                          €2,211.77Price
                                                                                                                                                                          En Stock
                                                                                                                                                                          €140.89 Price
                                                                                                                                                                          En Stock
                                                                                                                                                                          €140.89 Price
                                                                                                                                                                          Roulement Ar Clio 2 RS
                                                                                                                                                                              Roulement Ar pour Clio 2 RS. Lors du changement de disque arrière par un autre que celui d'origine, en général, le roulement n'est pas fourni, nous pouvons vous le fournir. En cas d'achat de disques arrières et des roulements, nous vous les assemblons gratuitement sur simple demande.
                                                                                                                                                                              €140.89Price
                                                                                                                                                                              Roulement Ar Clio 2 RS
                                                                                                                                                                                  Roulement Ar pour Clio 2 RS. Lors du changement de disque arrière par un autre que celui d'origine, en général, le roulement n'est pas fourni, nous pouvons vous le fournir. En cas d'achat de disques arrières et des roulements, nous vous les assemblons gratuitement sur simple demande.
                                                                                                                                                                                  €140.89Price
                                                                                                                                                                                  SADEV 17-Tooth Secondary Shaft (17/55) F9001002 - ST75 Sequential GearboxSADEV 17-Tooth Secondary Shaft (17/55) F9001002 - ST75 Sequential Gearbox
                                                                                                                                                                                      The SADEV 17-Tooth Secondary Shaft (references F9001002 / 0109001002 ) is the drive pinion for the 17/55 final drive ratio in your SADEV ST75 sequential gearbox . This piece is vital for transmitting engine power to the 55-tooth crownwheel and is homologated for the Renault Clio 2 X65 Cup ....
                                                                                                                                                                                      €928.99Price
                                                                                                                                                                                      SADEV 17-Tooth Secondary Shaft (17/55) F9001002 - ST75 Sequential GearboxSADEV 17-Tooth Secondary Shaft (17/55) F9001002 - ST75 Sequential Gearbox
                                                                                                                                                                                          The SADEV 17-Tooth Secondary Shaft (references F9001002 / 0109001002 ) is the drive pinion for the 17/55 final drive ratio in your SADEV ST75 sequential gearbox . This piece is vital for transmitting engine power to the 55-tooth crownwheel and is homologated for the Renault Clio 2 X65 Cup ....
                                                                                                                                                                                          €928.99Price
                                                                                                                                                                                          SADEV 55-Tooth Crownwheel (17-Shaft) F9001012 - ST75 Sequential GearboxSADEV 55-Tooth Crownwheel (17-Shaft) F9001012 - ST75 Sequential Gearbox
                                                                                                                                                                                              The SADEV 55-Tooth Crownwheel (reference F9001012 ) is an essential component of the 17/55 final drive ratio in your SADEV ST75 sequential gearbox . This genuine part is crucial for gearing and must pair perfectly with the corresponding 17-tooth secondary shaft. It is primarily used on the Renault Clio 2 X65...
                                                                                                                                                                                              €1,031.42Price
                                                                                                                                                                                              SADEV 55-Tooth Crownwheel (17-Shaft) F9001012 - ST75 Sequential GearboxSADEV 55-Tooth Crownwheel (17-Shaft) F9001012 - ST75 Sequential Gearbox
                                                                                                                                                                                                  The SADEV 55-Tooth Crownwheel (reference F9001012 ) is an essential component of the 17/55 final drive ratio in your SADEV ST75 sequential gearbox . This genuine part is crucial for gearing and must pair perfectly with the corresponding 17-tooth secondary shaft. It is primarily used on the Renault Clio 2 X65...
                                                                                                                                                                                                  €1,031.42Price
                                                                                                                                                                                                  Douille à aiguille axe de selection carter mécanique Megane 3 RS et N4
                                                                                                                                                                                                      Douille à aiguille carter mécanique Megane N4 Référence: 8200135215  
                                                                                                                                                                                                      €15.05Price
                                                                                                                                                                                                      Douille à aiguille axe de selection carter mécanique Megane 3 RS et N4
                                                                                                                                                                                                          Douille à aiguille carter mécanique Megane N4 Référence: 8200135215  
                                                                                                                                                                                                          €15.05Price
                                                                                                                                                                                                          SADEV 54-Tooth Crownwheel (15-Shaft) F1908252 - ST75 Sequential GearboxSADEV 54-Tooth Crownwheel (15-Shaft) F1908252 - ST75 Sequential Gearbox
                                                                                                                                                                                                              The SADEV 54-Tooth Crownwheel (reference F1908252 ) is an essential element of the final drive in your SADEV ST75 sequential gearbox . Designed to be assembled with the 15-tooth secondary shaft, this genuine part ensures precise and reliable gearing for the Renault Clio 3 X85 Cup . OPTIMIZ ACCESS is a...
                                                                                                                                                                                                              €1,031.42Price
                                                                                                                                                                                                              SADEV 54-Tooth Crownwheel (15-Shaft) F1908252 - ST75 Sequential GearboxSADEV 54-Tooth Crownwheel (15-Shaft) F1908252 - ST75 Sequential Gearbox
                                                                                                                                                                                                                  The SADEV 54-Tooth Crownwheel (reference F1908252 ) is an essential element of the final drive in your SADEV ST75 sequential gearbox . Designed to be assembled with the 15-tooth secondary shaft, this genuine part ensures precise and reliable gearing for the Renault Clio 3 X85 Cup . OPTIMIZ ACCESS is a...
                                                                                                                                                                                                                  €1,031.42Price
                                                                                                                                                                                                                  Roulement de roue avant Clio R3 Max
                                                                                                                                                                                                                      Do not compromise your safety on the track or during a rally stage with low-end components. This front wheel bearing , sourced from the official RENAULT Sport catalogue (Ref: 7711160524) , is the essential part to ensure the steering precision of your Clio R3 Max , Clio 4 Cup , and Clio 4 R3T . Designed to...
                                                                                                                                                                                                                      €98.40Price
                                                                                                                                                                                                                      Roulement de roue avant Clio R3 Max
                                                                                                                                                                                                                          Do not compromise your safety on the track or during a rally stage with low-end components. This front wheel bearing , sourced from the official RENAULT Sport catalogue (Ref: 7711160524) , is the essential part to ensure the steering precision of your Clio R3 Max , Clio 4 Cup , and Clio 4 R3T . Designed to...
                                                                                                                                                                                                                          €98.40Price