Bike Seatpost Length 400mm Outer Diameter 27.2/30.9/31.6mm, Bicycle Seat Post Aluminum Alloy Offset 25mm for MTB BMX

Reduce Wind Resistance: Bike Seatpost with Characteristic hollow wind-breaking design to reduce wind resistance and make riding easier. And it is made of 6061 aluminum alloy and 3D integrated forging, lightweight and durable Standard Size: Length:400mm; Thickness of the tube: 3mm; Three sizes to choose from depending on the frame outer diameter:27.2mm 30.9mm 31.6mm; Color: Matte Black; Angle: 10° Easy Installation:Installation is a breeze, simply unbolt the old seat and remove the seat post then bolt the seat to the new seat post and install it into the bike frame Universal:Aurnoet Bicycle Seatpost is suitable for mountain bikes, fixed gear bicycles, MTB, BMX, etc. Note: There is a safety line scale on the bicycle seat post, do not use it below the safety line. Please measure the actually required diameter before purchasing