Thru-axle fork mount bike carrier fits complete range of thru-axle diameters and has universal roof rack system compatibility. Features*One-handed throw-hood design fits a full range of 12mm to 20mm thru-axles *Expanding wide-jaw clamp accommodates a bike's thru-axle so there are no loose parts for easier loading *Ergonomic precision dial ensures a secure and stable grip by optimizing clamping pressure on thru-axles *D shaped low profile tray design provides better aerodynamics *Tool-free universal mounting makes it simple and easy to install *Thule's One-key lock cylinder (sold separately) allows you to lock the bike to the carrier and the carrier to the rack *Fits Thule rack systems, round bars and most factory racks with both T-track and around the bar mounting options 91021830479 19590900012 535