1 season of use on this incredibly light carbon post. Diameter is 25.0, but will fit any frame with the shims that you can buy. U.S.E. actually recommends this size post for for 27.2 and smaller with the required shim. It avoids you having to acutally have a clamp touch the carbon fiber. 135 grams on the local shop scale. $50 plus $3.50 USPS priority shipping. email me with any questions.
