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The ultimate benchmark in the world of motorsport, SADEV designs and manufactures high-technology sequential gearboxes and transmissions. Optimiz Access is your premier distributor for the SADEV range dedicated to Renault Sport rally and circuit vehicles (Clio Cup, R3, Twingo R2, Megane N4).

SADEV: Competition Transmission Excellence at Optimiz Access

For decades, the name SADEV has resonated in paddocks and service parks as synonymous with performance, reliability, and cutting-edge engineering. As the specialist in motorsport transmissions, SADEV equips champions across all disciplines, from rally to circuit racing and rallycross.

Choosing a SADEV transmission means opting for proven technical solutions: dog-ring sequential gearboxes, high-performance limited-slip differentials, and impeccable machining quality, ensuring ultra-fast gear shifts and maximum endurance under stress.

Your SADEV Partner for the Renault Sport Range

At Optimiz Access, we share this demand for performance. Our expertise allows us to support you in the maintenance, servicing, and evolution of your SADEV transmissions. We distribute the complete range of spare parts and complete gearboxes specifically developed for Renault competition vehicles.

Find on this page all SADEV references adapted to the following models:

  • Renault Clio 2 X65 Cup and Clio Gr N
  • Renault Clio 3 X85 Cup
  • Renault Clio R3 (Access, Max)
  • Renault Twingo R2
  • Renault Megane N4

Whether you are looking for a revision kit, replacement gears, output flanges, or a complete sequential gearbox, our catalog ensures you find the original SADEV part needed to keep your vehicle at the peak of its performance.

There are 129 products.

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Rondelle belleville galbe 1,20 Clio Gr N
      1.20 Belleville Washer SADEV ST66 (F0085914) Precisely adjust the locking differential preload with this genuine Renault Sport 1.20 Belleville washer, manufactured by SADEV. Designed for the Renault Clio 2 Gr N equipped with the ST66 gearbox, it ensures optimal preload. Essential for maximum performance in competition.
      €62.56Price
      Rondelle belleville galbe 1,20 Clio Gr N
          1.20 Belleville Washer SADEV ST66 (F0085914) Precisely adjust the locking differential preload with this genuine Renault Sport 1.20 Belleville washer, manufactured by SADEV. Designed for the Renault Clio 2 Gr N equipped with the ST66 gearbox, it ensures optimal preload. Essential for maximum performance in competition.
          €62.56Price
          Sur commande ou en cours de réappro
          €2.03 Price
          Sur commande ou en cours de réappro
          €2.03 Price
          Joint torique nitrile Ø 110 x 3 Clio Gr NJoint torique nitrile Ø 110 x 3 Clio Gr N
              Joint torique nitrile Ø 110 x 3 Clio Gr N Référence: 0201057
              €2.03Price
              Joint torique nitrile Ø 110 x 3 Clio Gr NJoint torique nitrile Ø 110 x 3 Clio Gr N
                  Joint torique nitrile Ø 110 x 3 Clio Gr N Référence: 0201057
                  €2.03Price
                  Vis CHC M8x20 CL 10.9 Brut Clio Gr NSADEV M8x20 CHC Bolt - Renault Clio 2 Gr.N ST66 Gearbox
                      Do not risk an oil leak or a complete transmission failure due to neglected hardware. This M8x20 CHC bolt (Grade 10.9, raw finish) is an official Renault Sport component, manufactured by SADEV . Specifically designed for securing the differential cover on the ST66 gearbox of the Renault Clio 2...
                      €0.79Price
                      Vis CHC M8x20 CL 10.9 Brut Clio Gr NSADEV M8x20 CHC Bolt - Renault Clio 2 Gr.N ST66 Gearbox
                          Do not risk an oil leak or a complete transmission failure due to neglected hardware. This M8x20 CHC bolt (Grade 10.9, raw finish) is an official Renault Sport component, manufactured by SADEV . Specifically designed for securing the differential cover on the ST66 gearbox of the Renault Clio 2...
                          €0.79Price
                          Couronne 58 dents ( 12 / 58 ) équipée Clio Gr NSADEV 58x12 Crown Wheel - Renault Sport Clio 2 Gr.N ST66
                              Do not risk a mechanical failure and retirement during your next stage. This 56-tooth crown wheel for 12-tooth shafts is an official Renault Sport competition part, engineered by the experts at SADEV for the Renault Clio 2 Group N equipped with the ST66 gearbox . As the exclusive distributor ...
                              €758.77Price
                              Couronne 58 dents ( 12 / 58 ) équipée Clio Gr NSADEV 58x12 Crown Wheel - Renault Sport Clio 2 Gr.N ST66
                                  Do not risk a mechanical failure and retirement during your next stage. This 56-tooth crown wheel for 12-tooth shafts is an official Renault Sport competition part, engineered by the experts at SADEV for the Renault Clio 2 Group N equipped with the ST66 gearbox . As the exclusive distributor ...
                                  €758.77Price
                                  Sur commande ou en cours de réappro
                                  €948.16 Price
                                  Sur commande ou en cours de réappro
                                  €948.16 Price
                                  SADEV 12-Tooth Secondary Shaft (7711129468) - Renault Clio 2 Gr N ST66 GearboxSADEV 12-Tooth Secondary Shaft (7711129468) - Renault Clio 2 Gr N ST66 Gearbox
                                      The SADEV 12-Tooth Secondary Shaft (7711129468 / F19030201) is a core component of your SADEV ST66 gearbox. This original SADEV part ensures the vital connection to the differential via the 58-tooth crown wheel for the specific 12x58 final drive . The replacement of a damaged...
                                      €948.16Price
                                      SADEV 12-Tooth Secondary Shaft (7711129468) - Renault Clio 2 Gr N ST66 GearboxSADEV 12-Tooth Secondary Shaft (7711129468) - Renault Clio 2 Gr N ST66 Gearbox
                                          The SADEV 12-Tooth Secondary Shaft (7711129468 / F19030201) is a core component of your SADEV ST66 gearbox. This original SADEV part ensures the vital connection to the differential via the 58-tooth crown wheel for the specific 12x58 final drive . The replacement of a damaged...
                                          €948.16Price
                                          Sur commande ou en cours de réappro
                                          €948.16 Price
                                          Sur commande ou en cours de réappro
                                          €948.16 Price
                                          Arbre secondaire 11 dents (pour couronne 52 dts) Clio Gr NSADEV 11-Tooth Secondary Shaft - Renault Clio 2 Gr.N ST66
                                              Do not let a fragile transmission compromise your rally performance. This 11-tooth secondary shaft , specifically designed to mate with a 52-tooth crown wheel , is an official Renault Sport competition part manufactured by SADEV . Destined for the ST66 gearbox of the Renault Clio 2 Group N ,...
                                              €948.16Price
                                              Arbre secondaire 11 dents (pour couronne 52 dts) Clio Gr NSADEV 11-Tooth Secondary Shaft - Renault Clio 2 Gr.N ST66
                                                  Do not let a fragile transmission compromise your rally performance. This 11-tooth secondary shaft , specifically designed to mate with a 52-tooth crown wheel , is an official Renault Sport competition part manufactured by SADEV . Destined for the ST66 gearbox of the Renault Clio 2 Group N ,...
                                                  €948.16Price
                                                  Couronne 52 dents ( 11 / 52 ) équipée Clio Gr NSADEV 52-Tooth Crown Wheel for Renault Clio 2 Gr.N (11/52 Ratio)
                                                      Don't let poor gear ratios ruin your stage times. This official 52-tooth crown wheel , manufactured by SADEV for Renault Sport , is the key component for your 11/52 final drive . Specifically designed for the Renault Clio 2 Gr.N equipped with the ST66 gearbox , it...
                                                      €565.21Price
                                                      Couronne 52 dents ( 11 / 52 ) équipée Clio Gr NSADEV 52-Tooth Crown Wheel for Renault Clio 2 Gr.N (11/52 Ratio)
                                                          Don't let poor gear ratios ruin your stage times. This official 52-tooth crown wheel , manufactured by SADEV for Renault Sport , is the key component for your 11/52 final drive . Specifically designed for the Renault Clio 2 Gr.N equipped with the ST66 gearbox , it...
                                                          €565.21Price
                                                          Ecrou d'arbre primaire M18 x 150 (pas à droite) Clio Gr N
                                                              Ecrou d'arbre primaire M18 x 150 (pas à droite) Clio Gr N
                                                              €19.57Price
                                                              Ecrou d'arbre primaire M18 x 150 (pas à droite) Clio Gr N
                                                                  Ecrou d'arbre primaire M18 x 150 (pas à droite) Clio Gr N
                                                                  €19.57Price
                                                                  SADEV Secondary Shaft Nut F1903204 - Clio 2 Gr N ST66 GearboxSADEV Secondary Shaft Nut F1903204 - Clio 2 Gr N ST66 Gearbox
                                                                      The SADEV Secondary Shaft Nut (F1903204) is a critical safety part ensuring the final drive is held securely on the secondary shaft of your SADEV ST66 gearbox. This nut is an original SADEV component, essential for the Renault Clio 2 Group N . Replacing this nut...
                                                                      €16.88Price
                                                                      SADEV Secondary Shaft Nut F1903204 - Clio 2 Gr N ST66 GearboxSADEV Secondary Shaft Nut F1903204 - Clio 2 Gr N ST66 Gearbox
                                                                          The SADEV Secondary Shaft Nut (F1903204) is a critical safety part ensuring the final drive is held securely on the secondary shaft of your SADEV ST66 gearbox. This nut is an original SADEV component, essential for the Renault Clio 2 Group N . Replacing this nut...
                                                                          €16.88Price
                                                                          Couple 12X53 long - grosses cannelures Twingo R2 7711167608
                                                                              Optimize your transmission's top speed with the 12X53 Long Final Drive (large splines) specifically developed for the Twingo R2 . This crown wheel and pinion set, available under reference 7711167608 , is the ideal solution to adapt your final...
                                                                              €1,810.32Price
                                                                              Couple 12X53 long - grosses cannelures Twingo R2 7711167608
                                                                                  Optimize your transmission's top speed with the 12X53 Long Final Drive (large splines) specifically developed for the Twingo R2 . This crown wheel and pinion set, available under reference 7711167608 , is the ideal solution to adapt your final...
                                                                                  €1,810.32Price
                                                                                  Sur commande ou en cours de réappro
                                                                                  €168.11 Price
                                                                                  Sur commande ou en cours de réappro
                                                                                  €168.11 Price
                                                                                  Baladeur crabot Clio Gr N
                                                                                      Do not jeopardize the reliability of your gear changes! This 3-4 dog ring slider (Ref. F1903205 ) from SADEV is the essential replacement part to maintain the performance of your ST66 sequential gearbox on the <strong...
                                                                                      €168.11Price
                                                                                      Baladeur crabot Clio Gr N
                                                                                          Do not jeopardize the reliability of your gear changes! This 3-4 dog ring slider (Ref. F1903205 ) from SADEV is the essential replacement part to maintain the performance of your ST66 sequential gearbox on the <strong...
                                                                                          €168.11Price
                                                                                          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
                                                                                                  Couronne  56 dents - Ph2 Clio Gr N
                                                                                                      Do not let an approximate transmission compromise your stage times. This 56-tooth crown wheel for 11-tooth shafts is an official Renault Sport component, engineered by SADEV specifically for the Renault Clio 2 Group N equipped with the ST66 gearbox . As the exclusive distributor of SADEV parts for the Renault...
                                                                                                      €820.75Price
                                                                                                      Couronne  56 dents - Ph2 Clio Gr N
                                                                                                          Do not let an approximate transmission compromise your stage times. This 56-tooth crown wheel for 11-tooth shafts is an official Renault Sport component, engineered by SADEV specifically for the Renault Clio 2 Group N equipped with the ST66 gearbox . As the exclusive distributor of SADEV parts for the Renault...
                                                                                                          €820.75Price
                                                                                                          Roue de 3ème 22 dents (16/22) Clio Gr NSADEV 3rd Gear Wheel 22 Teeth ST66 Gearbox - Renault Clio 2 Gr N
                                                                                                              Don't sacrifice the performance of your SADEV ST66 gearbox ! This 3rd speed wheel (22 teeth, 16/22 ratio) from SADEV (Ref. F1903206) is an essential spare part to maintain the reliability of your Renault Clio 2 Gr N . At...
                                                                                                              €213.70Price
                                                                                                              Roue de 3ème 22 dents (16/22) Clio Gr NSADEV 3rd Gear Wheel 22 Teeth ST66 Gearbox - Renault Clio 2 Gr N
                                                                                                                  Don't sacrifice the performance of your SADEV ST66 gearbox ! This 3rd speed wheel (22 teeth, 16/22 ratio) from SADEV (Ref. F1903206) is an essential spare part to maintain the reliability of your Renault Clio 2 Gr N . At...
                                                                                                                  €213.70Price
                                                                                                                  En Stock
                                                                                                                  €82.49 Price
                                                                                                                  En Stock
                                                                                                                  €82.49 Price
                                                                                                                  Bague épaulée Clio Gr N
                                                                                                                      1st Gear Wheel Shoulder Ring SADEV ST66 (F1903019) Ensure the precision and reliability of your 1st gear with this genuine Renault Sport 1st gear wheel shoulder ring. Designed for the Clio Gr N's SADEV ST66 gearbox, it optimizes your transmission's operation. Essential for maintaining consistent performance in competition.
                                                                                                                      €82.49Price
                                                                                                                      Bague épaulée Clio Gr N
                                                                                                                          1st Gear Wheel Shoulder Ring SADEV ST66 (F1903019) Ensure the precision and reliability of your 1st gear with this genuine Renault Sport 1st gear wheel shoulder ring. Designed for the Clio Gr N's SADEV ST66 gearbox, it optimizes your transmission's operation. Essential for maintaining consistent performance in competition.
                                                                                                                          €82.49Price
                                                                                                                          Demi arbre - Ph2 Clio Gr N
                                                                                                                              Secure your drivetrain with the authentic Renault Sport Phase 2 half-shaft (right differential output) . Manufactured by SADEV for the Clio 2 Gr.N equipped with the ST66 gearbox , this critical component is built to withstand the extreme stresses of rallying. Do not risk a failure mid-stage by...
                                                                                                                              €295.69Price
                                                                                                                              Demi arbre - Ph2 Clio Gr N
                                                                                                                                  Secure your drivetrain with the authentic Renault Sport Phase 2 half-shaft (right differential output) . Manufactured by SADEV for the Clio 2 Gr.N equipped with the ST66 gearbox , this critical component is built to withstand the extreme stresses of rallying. Do not risk a failure mid-stage by...
                                                                                                                                  €295.69Price
                                                                                                                                  En Stock
                                                                                                                                  €25.99 Price
                                                                                                                                  En Stock
                                                                                                                                  €25.99 Price
                                                                                                                                  Cage à aiguille Clio Gr N
                                                                                                                                      Do not let a component worth a few euros destroy your entire transmission. This SADEV needle bearing (reference 0105018) is an official Renault Sport part, essential for the 3rd and 4th gear sliding sleeve support . Specifically designed for the SADEV ST66 gearbox in the Renault Clio 2 Group N , it ensures...
                                                                                                                                      €25.99Price
                                                                                                                                      Cage à aiguille Clio Gr N
                                                                                                                                          Do not let a component worth a few euros destroy your entire transmission. This SADEV needle bearing (reference 0105018) is an official Renault Sport part, essential for the 3rd and 4th gear sliding sleeve support . Specifically designed for the SADEV ST66 gearbox in the Renault Clio 2 Group N , it ensures...
                                                                                                                                          €25.99Price
                                                                                                                                          Bague épaulée 2-3 Clio Gr NSADEV 2-3 Speed Stepped Thrust Washer ST66 - Renault Clio 2 Gr N
                                                                                                                                              Guarantee the precision of 2nd and 3rd gears in your SADEV ST66 gearbox ! This 2nd-3rd gear stepped thrust washer (Ref. F1903017 ) from SADEV is essential for axial...
                                                                                                                                              €97.82Price
                                                                                                                                              Bague épaulée 2-3 Clio Gr NSADEV 2-3 Speed Stepped Thrust Washer ST66 - Renault Clio 2 Gr N
                                                                                                                                                  Guarantee the precision of 2nd and 3rd gears in your SADEV ST66 gearbox ! This 2nd-3rd gear stepped thrust washer (Ref. F1903017 ) from SADEV is essential for axial...
                                                                                                                                                  €97.82Price
                                                                                                                                                  Cage à aiguille Clio Gr N
                                                                                                                                                      A vital component for the precision of your ST66 SADEV dog-ring gearbox : the needle roller cage (P/N: 0105019 or 0100105019 ). Designed for the Renault Clio 2 Gr N , this cage ensures the smooth operation of the bearing on the 1st and 2nd-3rd gear thrust washers . A worn cage guarantees you...
                                                                                                                                                      €32.83Price
                                                                                                                                                      Cage à aiguille Clio Gr N
                                                                                                                                                          A vital component for the precision of your ST66 SADEV dog-ring gearbox : the needle roller cage (P/N: 0105019 or 0100105019 ). Designed for the Renault Clio 2 Gr N , this cage ensures the smooth operation of the bearing on the 1st and 2nd-3rd gear thrust washers . A worn cage guarantees you...
                                                                                                                                                          €32.83Price
                                                                                                                                                          Entraineur gauche Ragnotti Clio Gr N
                                                                                                                                                              The SADEV Left Drive Flange (7711129608 / F1903157) is the original SADEV part that ensures the final transmission of engine torque from your SADEV ST66 gearbox to the driveshaft. A crucial link in the kinematic chain of your Renault Clio 2 Group N . A...
                                                                                                                                                              €806.15Price
                                                                                                                                                              Entraineur gauche Ragnotti Clio Gr N
                                                                                                                                                                  The SADEV Left Drive Flange (7711129608 / F1903157) is the original SADEV part that ensures the final transmission of engine torque from your SADEV ST66 gearbox to the driveshaft. A crucial link in the kinematic chain of your Renault Clio 2 Group N . A...
                                                                                                                                                                  €806.15Price
                                                                                                                                                                  Tulipe droite Clio 3 Cup
                                                                                                                                                                      The SADEV Right Side Output Flange (references F1908351 / 7711160349 ) is the gearbox output element that ensures the connection between the differential and the driveshaft (Lobro type) of your right-hand transmission. An indispensable part of the SADEV ST75 sequential gearbox , it is homologated for the...
                                                                                                                                                                      €338.34Price
                                                                                                                                                                      Tulipe droite Clio 3 Cup
                                                                                                                                                                          The SADEV Right Side Output Flange (references F1908351 / 7711160349 ) is the gearbox output element that ensures the connection between the differential and the driveshaft (Lobro type) of your right-hand transmission. An indispensable part of the SADEV ST75 sequential gearbox , it is homologated for the...
                                                                                                                                                                          €338.34Price
                                                                                                                                                                          Joint spy boite Clio Gr NSADEV ST66 Gearbox Oil Seal Driveshaft Output – Renault Clio 2 Gr N
                                                                                                                                                                              Don't let a simple part compromise the performance of your Renault Clio 2 Gr N ! This gearbox oil seal (P/N: 0205047 ) is the essential original part to ensure the perfect sealing of your ST66 SADEV gearbox. By choosing this oil seal, you prevent critical transmission oil leaks that could...
                                                                                                                                                                              €6.62Price
                                                                                                                                                                              Joint spy boite Clio Gr NSADEV ST66 Gearbox Oil Seal Driveshaft Output – Renault Clio 2 Gr N
                                                                                                                                                                                  Don't let a simple part compromise the performance of your Renault Clio 2 Gr N ! This gearbox oil seal (P/N: 0205047 ) is the essential original part to ensure the perfect sealing of your ST66 SADEV gearbox. By choosing this oil seal, you prevent critical transmission oil leaks that could...
                                                                                                                                                                                  €6.62Price
                                                                                                                                                                                  En Stock
                                                                                                                                                                                  €706.79 Price
                                                                                                                                                                                  En Stock
                                                                                                                                                                                  €706.79 Price
                                                                                                                                                                                  Rapport de 4ème 22/27 Megane N4SADEV 4th Gear Ratio 22/27 for Renault Mégane N4
                                                                                                                                                                                      Optimize your transmission's precision with this genuine 4th gear ratio (22/27) from the Renault Sport catalog. Specifically engineered for the SADEV dog-ring gearbox used in the Mégane N4 , this official component ensures absolute reliability during high-speed gear changes in rallies or track days. Do not let a worn gear...
                                                                                                                                                                                      €706.79Price
                                                                                                                                                                                      Rapport de 4ème 22/27 Megane N4SADEV 4th Gear Ratio 22/27 for Renault Mégane N4
                                                                                                                                                                                          Optimize your transmission's precision with this genuine 4th gear ratio (22/27) from the Renault Sport catalog. Specifically engineered for the SADEV dog-ring gearbox used in the Mégane N4 , this official component ensures absolute reliability during high-speed gear changes in rallies or track days. Do not let a worn gear...
                                                                                                                                                                                          €706.79Price
                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                          €1,004.35 Price
                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                          €1,004.35 Price
                                                                                                                                                                                          Arbre Secondaire 11 dents (pour couronne 56 dents) Clio Gr NArbre Secondaire 11 dents (pour couronne 56 dents) Clio Gr N
                                                                                                                                                                                              Arbre Secondaire 11 dents (pour couronne 56 dents) Clio Gr N Référence: 7711129543
                                                                                                                                                                                              €1,004.35Price
                                                                                                                                                                                              Arbre Secondaire 11 dents (pour couronne 56 dents) Clio Gr NArbre Secondaire 11 dents (pour couronne 56 dents) Clio Gr N
                                                                                                                                                                                                  Arbre Secondaire 11 dents (pour couronne 56 dents) Clio Gr N Référence: 7711129543
                                                                                                                                                                                                  €1,004.35Price
                                                                                                                                                                                                  Disque de friction
                                                                                                                                                                                                      Do not let a failing transmission compromise your track performance. The SADEV friction disc (ref. F1401086) is the critical component to ensure perfect torque transfer for your sequential gearbox. Specifically engineered for the Renault Clio 2 Gr.N , Twingo R2 , and Clio 3 X85 Cup , this genuine part provides the reliability...
                                                                                                                                                                                                      €94.03Price
                                                                                                                                                                                                      Disque de friction
                                                                                                                                                                                                          Do not let a failing transmission compromise your track performance. The SADEV friction disc (ref. F1401086) is the critical component to ensure perfect torque transfer for your sequential gearbox. Specifically engineered for the Renault Clio 2 Gr.N , Twingo R2 , and Clio 3 X85 Cup , this genuine part provides the reliability...
                                                                                                                                                                                                          €94.03Price