Bike Seatpost Adapter Shim Converter Spacer Aluminum

Material: aluminum
Weight: 15 grams
This adapter can convert the diameter of your bike seatpost.
For example, letting your 27.2mm seatpost function as a 31.6mm seatpost. (27.2mm seatpost plus a 31.6mm adapter shim, then it can work as 31.6mm)
Size we offer are:
25.4mm to 27.2,
25.4mm to 30.9,
25.4mm to 31.6,
27.2mm to 28.6,
27.2mm to 30.0,
27.2mm to 30.4,
27.2mm to 30.9,
27.2mm to 31.6,
27.2mm to 33.9,
30.9mm to 31.6,
31.8mm to 34.9