The CEC #S35 Titanium Seatpost Collar in 34.9 mm diameter embodies technical excellence in the service of performance and longevity. Manufactured by CEC (Carbon Endurance Component), a renowned specialist in carbon and titanium components for ultra-endurance cycling, this collar combines extreme lightness, mechanical strength, and unwavering reliability. Designed in aerospace titanium alloy (Grade 5 Ti-6Al-4V or 3Al/2.5V), it guarantees optimal seatpost clamping while resisting corrosion, impacts, and the most severe stresses, both on road and off-road.

Technical Summary

This collar with a 34.9 mm outer diameter is specifically sized for MTB, Gravel, and Touring frame seat tubes with Boost or standard specifications, accommodating 31.6 mm seatposts. With an estimated weight between 18 and 22 grams, it is among the lightest components in its category, without any compromise on strength. The integrated clamping bolt, also made of titanium, allows precise adjustment to the recommended torque of 5 to 6 Nm, ensuring firm hold and frame protection.

Technical Highlights

• Aerospace material: Grade 5 titanium alloy (Ti-6Al-4V) or 3Al/2.5V, offering an exceptional strength-to-weight ratio and total resistance to corrosion (water, salt, mud).
• Optimized lightness: Weight between 18 and 22 g, ideal for high-end setups in bikepacking, gravel racing, or XC.
• Machining precision: CNC machined with millimetric tolerance for uniform clamping without risk of tube deformation.
• Secure clamping: Allen bolt system (4 or 5 mm key) guaranteeing constant torque and preventing seatpost slippage under stress.
• Extended compatibility: Fits titanium, steel, aluminum, and carbon frames with a 34.9 mm seat tube (standard widespread on modern Boost MTBs and 29" Gravel frames)