Personalize your ride with the Specialized Seat Collar. It fits all Specialized mountain bike frames with 30.9 or 35mm seatposts (O.D.).
35mm inner diameter fits all alloy Specialized MTB frame designs with 30.9mm posts & 35mm O.D. seat tubes.
37mm inner diameter fits all carbon Specialized MTB frame designs with 30.9mm posts & 37mm O.D. seat tubes.