This deluxe roof rack is manufactured in steel the bike sits into a wheel channel the adjustable cycle security locking clamp fits to the bikes down tube for a secure fastening fits to most roof bars 60 x 55mm bike channel ensures your bike is centrally mounted maximum tyre width 55mm tuv tested to din standards straps tested to 150 kg two piece rail for easy stocking powder coated anti rust treatment use with roofbars up to 60mm 100 manufactured in italy lockable