SB15 Clutch Shaft End Circlip SADEV Gearbox Clio R3

The Destructive Danger of a Worn or Reused SB15 Shaft End Circlip in Competition

In motorsport, and more particularly on dog-engagement transmissions subjected to heavy engagement stresses, the slightest neglect of a retaining component can be fatal. Attempting to reuse an old clutch shaft end SB15 circlip or installing an uncalibrated aftermarket model on your SADEV sequential gearbox is the fastest way to cause a major breakdown. Under the effect of continuous high-RPM vibrations from your Renault Clio R3 engine, a circlip that has already been under load loses its original elastic tension. If it pops out of its anchoring groove in the middle of a stage, the clutch shaft undergoes immediate axial play. Without this critical retention at the shaft end, gear alignment is destroyed, leading to instantaneous gear stack breakage and an immediate retirement. Do not risk ruining an entire race transmission worth thousands of euros for a single neglected snap ring.

Certified Factory Quality and Genuine Manufacturer Origin: Renault Sport – Reference 7711162186

This technical safety part has nothing in common with standard hardware store circlips. This is the official Renault Sport SB15 circlip, manufactured by racing transmission specialist SADEV for the official competition catalogue of the Clio R3 under the exact reference 7711162186. Engineered from high-grade, heat-treated spring steel, it provides absolute resistance to shearing forces and radial deformation. It is the only certified component capable of maintaining the necessary preload and guaranteeing an infallible lock that meets the strict factory tolerances of the manufacturer.

Technical Specifications and SB15 Retaining Ring Features

• Component Name: SB15 Retaining Snap Ring for Clutch Shaft End
• Transmission Compatibility: SADEV brand sequential gearbox
• Vehicle Application: Renault Clio R3 (All Rally, Dirt, and Tarmac competition versions)
• Component Origin: Official Renault Sport / Alpine Racing Catalogue
• Manufacturer Reference: 7711162186

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Since 2010, Optimiz Access has established itself as the trusted partner of choice for drivers and tuners for the distribution of high-performance technical parts, precision mechanical servicing, and the premium customization of sports and premium vehicles. Our engineering expertise covers the catalogues of the finest performance brands: Renault Sport, Porsche, Audi, VW, and Mercedes.

For the assembly and metrological check of your race gearboxes, our own specialized workshops located in the Hauts-de-France region welcome you near the cities of Cambrai, Valenciennes, Lille, Douai, Arras, Seclin, and Saint-Quentin. Our qualified technicians handle the overhauling of your casings and transmissions. Fully understanding your tight race schedules, we ensure fast international shipping across the globe so your replacement components always arrive before your next technical scrutineering.

Frequently Asked Questions (FAQ) – Technical Advice for SADEV Clutch Shafts

Why is it forbidden to install an SB15 circlip that has already been used?

During its removal or first installation, the clutch shaft end SB15 circlip undergoes forced elastic deformation that alters its internal molecular structure. If refitted onto the Renault Clio R3 shaft, its radial gripping force will be reduced. Under axial load stresses, the circlip risks expanding and backing out of its seating groove.

Does the SB15 reference match other locations inside the gearbox?

No, this circlip bearing part number 7711162186 is calibrated to a tenth of a millimeter for the exact outer diameter of the SADEV Clio R3 clutch shaft end. In motorsport, precision excludes any approximation. As an analogy, please note that two different spark plug models exist for the Renault Megane 4 RS depending on its exact production year. To secure your assembly, feel free to contact our customer service team with your vehicle identification number (VIN) to get an exact match confirmation.

How do I purchase the other clips and spacers for the clutch shaft?

To seal up your transmission casing with absolute peace of mind in your workshop, friction washers, matching snap rings, as well as all other complementary products are fully accessible at the bottom of this product page.