Seatpost shims or sleeves. Bring your seat post size up to whatever size you need.
Made from AL6061-T6 aluminium. Anodised black.
Lip at the top of the seatpost sleeve to prevent slipping down into frame.
Shims allow a rider to adjust the ID of a frame to fit different sized seatposts for example sram reverbs only come in two sizes. Our shims will help you fit them to your bike.