Bolany mountain road bike aluminum alloy seat tube clamp bicycle parts quick release seatpost clamp

Brand: Bolany
Specifications: 31.8/34.9mm outer diameter
Material: aluminum alloy
Weight: about 40g
Color: black

OEM:YES 

How to choose:

31.8mm seat post clamp, suitable for 27.2/28.6 outer diameter seat posts.
34.9mm seat tube clamp, suitable for 30.4/30.8/30.9/31.6 outer diameter seat posts.