SportRack SR4612 Upshift Deluxe Upright Bike Carrier Locking clamp gently holds the down tube of the bike for greater stability Large wheel trays hold your bike securely during transit Lock included to secure the bike to the carrier Fits 1" - 25" diameter bike frames Fits on SportRack Roof Rack Systems, square, round and most factory roof racks Please check the fit for your vehicle in the fit guide located in the Product Details area.