Features of the Thule ThruRide 9mm Adapter 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 in. Din. 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 Compatible with 9mm skewer dropouts by using