Problem Solvers 0.7mm Shim, 30.9mm Seatpost to 31.6mm

Switching frames doesn’t mean you have to switch posts! Use your old posts without worry with the Problem Solvers Seatpost Shims. Length is 97mm with a 3mm lip totaling 100mm Due to the ultra-thin spec of this shim and varied manufacturing tolerances of frames and seatposts, we can't guarantee compatibility with all brands on the market Be gentle and use grease