The SportRack alternative hitch-mounted bike frame adapter allows you to bring your ride with you almost anywhere you go. You can secure bikes without horizontal tubing with this practical powder-coated steel accessory. This universal adapter has a telescoping design that extends from 14.62 to 29.25 to fit different kinds of bike models so even if you switch units or upgrade this granite great bike adapter bar will still remain useful and valuable. The rubber push-button protects the bike s finish as it attaches to the seat post and handlebar stem creating a solid and durable attachment point for a hitch-mounted bike rack. This bike rack adapter is a tool most any bike owner should have on hand.