BESNIN Seat Post, 27.2(1.07in ) mm/30.9mm(1.21in)/31.6mm(1.24in) Bike Seatpost 350mm 400mmmm Bicycle Saddle Angle Adjustable Seatpost for MTB Road Bike BMX (Alluminium Alloy)

Description Price: £37.03(as of Sep 21,2022 20:40:00 UTC – Details) 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! ! Q:The ad title says the size is 27.2/30.9/31.6 mm *350/400mm, 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. 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 Feature: ♫ aluminium alloy 6061(tube part) Note: This seatpost is NOT a carbon fiber seat tube, its material is aluminum alloy 6061 (tube part) If you need to buy a carbon fiber seat post, please see our other link ♫ Anti-corrosion ♫ anti-oxidation ♫ Suitable for most road bike, fixed gear bicycle, mountain bikes,downhill bike, track bike, MTB, BMX, DH, etc Total length: 350mm/400mm（We sell seat tubes in 2 lengths.which size you have choose please see the 1st ad description text） Outside Diameter and Weight: Package:1*seatpost(with stall srews) Note：Please measure you bike ,and choose the right outside diameter. Material：aluminium alloy 6061(tube part) ，Anti-corrosion, anti-oxidation，suit for long cycling.Adjustable：Clamp head angle adjustable,easy to install .you can find a comfort saddle angle for your personal love.Suitable for most road bike, fixed gear bicycle, mountain bikes, downhill bike, track bike, MTB, BMX, DH, etcThe seatpost outside diameter is 30.9mm(1.22 in),please measure your bike and choose the right model. Please double check whether it fits your bike size before buying! Our last picture has a measurement method