Specialized STC 30.6MM SEATPOST CLAMP BOLT-ON COLLAR W/ RACK MOUNTS

Add a rack to your frame, even if you don&&';;t have rack mounts. Allows standard rackstays to be bolted directly to the seat collar, for a clean and simple look. Made from lightweightaluminum for durability, with threaded inserts to bolt the stays directly into the seat clamp.