【Description of the bicycle seatposts】 MTB seat post material:Carbon fibre+Aluminium alloy head; Appearance:3K matte/3K glossy;Weight: approx.240 +/-10g; Diameter: 27.2/30.8/31.6mm;Length:350/400 mm;

【Suitable for bow size】 This bicycle seat post is suitable for mounting on a saddle with a hole. If the saddle does not have a hole, it is recommended to tighten the screw with an Allen key. The seat part of the clip is made of high-strength aluminium alloy, one-piece moulding, safe and durable; structure of the upper and lower parts of the clip, arch support cushion. Suitable for bow size: 6*6mm/7*7mm/ 7*9mm/7*10mm/8*10mm.

【Use an appropriate torque】Please observe the specified tightening torque (4 Nm) when installing the bicycle seat tube correctly. As the road bike seat post is made of carbon, we recommend that you tighten the body by squeezing it with your hands to support it. Cracks may occur if the seat post is subjected to excessive tension.

【Choose the size of carbon seatpost】1.Choose the same diameter as your original seatpost.The original seatpost usually has a size mark and you can buy it accordingly.2.Choose the size according to the inner diameter of the frame tube. measure the inner diameter of the frame tube and choose the right size;

【Multiple applications】 The seat post carbon road bike is a good fit for most road bikes, hybrid bikes, fixie bikes, gravel bikes, fixed gear bikes and track bikes Perfect for female male cyclists.