The Cane Creek Seatpost Shim adapts a 31.6 mm seatpost to a 34.9 mm seat tube. Made from durable machined aluminum, it measures 3-7/8 inches tall and has a sleek black anodized finish for enhanced aesthetics and wear protection. Lightweight and easy to install, it ensures a secure fit for quick adjustments and improved riding comfort. SKU: CKG-SPSHIM316349.