

SADEV 2nd Gear Ratio 18/35 for ST75-14 Renault Clio 3 Cup
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Do not let an unsuitable gear ratio break your momentum when exiting tight corners. The SADEV 2nd gear ratio 18/35 is the critical component to keep your ST75-14 sequential gearbox within its ideal torque range. As the exclusive SADEV distributor for the Renault Clio 3 Cup, Optimiz Access guarantees a genuine part essential for avoiding the RPM drops that cost you the victory.
The consequences of poor gearing on your Renault Clio 3 Cup
In racing, lacking the correct gearbox ratio translates immediately into lost seconds. By not replacing a worn or poorly geared sprocket with this SADEV 2nd gear ratio 18/35, you accept that your Clio 3 Cup will struggle to accelerate between turns. This lack of engine responsiveness limits the potential of your sports vehicle and allows your competitors to take the lead during the acceleration phase.
Optimiz Access Expertise: Exclusive SADEV Distributor
Choosing Optimiz Access means ensuring the authenticity of a high-end component. We are the exclusive distributors of SADEV products for the Renault Clio 3 Cup, as well as for the Clio 2 Gr N, Clio 2 Cup, and Twingo R2. Using a non-certified part in your ST75-14 gearbox risks a gearing failure and irreversible damage to your sequential transmission.
Your questions about SADEV ST75-14 gearing
- Why is the 18/35 ratio specific to the Clio 3 Cup? It has been calibrated to provide a perfect transition with the 1st gear, avoiding any power "gap" on technical circuits.
- Where can I have my gearbox serviced? Our specialized technicians handle technical customization and sports vehicle maintenance in our workshop located in Northern France, near Lille, Valenciennes, and Arras.
- Do you ship internationally? Yes, we export our racing parts worldwide with ultra-fast logistics.
Do not compromise your mechanical reliability
The SADEV sequential gearbox is a precision instrument that tolerates no approximation. By neglecting the quality of the 2nd gear ratio, you increase mechanical stress on the dog rings and reduce the longevity of your gearbox. Since 2010, Optimiz Access has been advising drivers on optimizing their racing machines. Based near Cambrai, Douai, and Saint Quentin, we are your primary contact for pure performance.
Note: All necessary complementary products (gasket sets, SADEV specific oil, bearings) are listed at the bottom of this product page.



