I.D. Seatpost Shims

Allow you to fit smaller diameter seat posts into various oversize size frames.
These shims are longer length than many others to provide secure friction to seat post and reduce leverage damage risk to frames.
Precision CNC machined alloy, with top lip.
25.4mm to fit most 26.4-27.2mm.
27.2mm to fit most 28.6-31.8mm.