Modifies women's bike frames as well as BMX and non-standard frames in order to be carried on hanging-style hitch and strap mount bike racks. Telescopic adjustment (18" - 30.5”) fits most bike frames New push button clamps for quick installation and removal Molded rubber pads protect bike finish Keeps bike securely centered and mounted on hanging style rear mounts Durable rubber collars secure easily and safely to bike stem and seat post