The Problem Solvers 4mm Seatpost Shim is an essential accessory for cyclists needing to adjust the fit of their seatpost. This shim allows you to fit a 30.9mm seatpost into a 34.9mm frame, ensuring a secure and stable ride.
Constructed from durable aluminum, it features a 3mm lip to prevent it from sliding into the frame during installation. With a total length of 100mm, including the lip, this shim is a practical solution for seatpost compatibility issues.
