BESNIN Suspension seatpost Tube 27.2/30.9/31.6 * 350mm Bike seat Post for MTB Road Bike BMX (27.2*350mm)

Under normal conditions without a load, the suspension seatpost will not generate elasticity. In the process of riding, or in the case of bumps on the road, our seat tube will generate elastic force to cushion the bumps caused by the ground. so if you want to test our suspension seatpost, please do the test on a bumpy road. Q: How can I determine if I received the correct size seat tube? A: The size is engraved on the bottom of the seat tube, you need to look at it under sufficient light. Q: How do I know what size seat tube I need to buy? A: Please check our last picture (the seventh), which contains information on how to measure the size of the seat tube. Q:What you need to pay special attention? A:the size between 30.9mm and 31.6mm difference is not big, but if it is different from your bicycle size, it still cannot be used normally, so please measure before buying! ! If it is measured that your seat tube is 30.9mm, please do not buy a 27.2mm or 31.6mm seat tube, because it will not be suitable Q:The ad title says the size is 27.2/30.9/31.6, but the ad text (which changes depending on what picture you click) gives different sizes - which is correct? A:Tips: Please choose your correct size according to the ad text (which changes depending on what picture you click). The title contains all the sizes we sell, which is not accurate enough. Please refer to the first description for the correct size. Feature: ? The Suspension seatpost have excellent shock absorber and buffering pressure performance ? aluminium alloy 6061(tube part) ? Anti-corrosion ? anti-oxidation ? Suitable for most road bike, fixed gear bicycle, mountain bikes,downhill bike, track bike, MTB, BMX, DH, etc