Bicycle Seatposts Clamps Clips Quick Release Aluminum Alloy Seat Tube Clamp

The size of the seat pipe is marked on the lower part of the seat pipe, for example, 30.9 350 mm. 34.9mm pipe clamp Suitable for sitting pipe with the range of 30.4-31.8 mm. 31.8mm pipe clamp Suitable for 27.2mm and 28.6mm sitting tubes.