SportRack Downshift Plus Bike Rack Easy-to-use lockable stainless steel skewer with oversized lever makes for secure and easy loading Aerodynamic, durable aluminum tray and adjustable wheel strap with ratchet buckle provide stable mounting platform Compatible with most 9mm disc brakes Fits bicycle wheelbases up to 48" and tire widths up to 2.3" Fits on Sport Rack Roof Rack Systems, square, round and most factory racks Please check the fit for your vehicle in the fit guide located in the Product Details area.