- New


Do not break your momentum in the heat of acceleration. The SADEV 3rd gear ratio 18/28 is the key element to ensure a perfect transition on your ST75-14 sequential gearbox. As the exclusive SADEV distributor for the Renault Clio 3 Cup, Optimiz Access offers this essential genuine part to keep your engine at the peak of its power curve and prevent any RPM drop in mid-gear.
Third gear is often the most utilized ratio on the track. By neglecting the precision of the SADEV 3rd gear ratio 18/28, you risk watching your competitors pull away during re-acceleration phases. A worn sprocket or a non-optimized ratio leads to a loss of traction and an RPM drop that directly penalizes your top speed. Without this part calibrated for the ST75-14, your sports vehicle will never express its full potential.
It is crucial to remember that Optimiz Access is the exclusive distributor of SADEV products for the Renault Clio 3 Cup, as well as for the Clio 2 (Gr N / Cup) and Twingo R2 models. Purchasing this 18/28 gear ratio from us ensures perfect compatibility with your original SADEV gearing. Not using official parts exposes your transmission to premature failure and accelerated wear of the dog rings.
Skipping gearbox maintenance with SADEV certified parts means accepting a possible mechanical failure during a race meeting. Since 2010, Optimiz Access has been the benchmark for technical customization and preparation for Renault Sport enthusiasts. Based near Cambrai, Douai, and Saint Quentin, we put our expertise at the service of your stopwatch.
Note: Find racing gear oil, bearings, and SADEV overhaul kits in the complementary products section at the bottom of the page.