Peruzzo pure instinct roof bar carrierthe pure instinct roof bar carrier from peruzzo is easy to use, has a generous max bike weight limit of 20kg and is compatible with modern bike sizes up to 29. Plus, it's made from high quality and super durable materials and features a 360° arm head for secure and stable bike fitting. Also, this rack has rubber protection on all bike contact points and an automatic locking system. This means it is also compatible and ensures safe transit when transporting carbon bikes.durable, secure and safe bike transportunique and patented, the pure instinct changes the rules. No more stretching to tighten up knobs and to lock to the bike frame, the pureinstinct roof carrier is as simple as it can be. Just push the bike frame towards the arm head and it snaps shut locking itself to the frame. To release there is a handy lever lower down so removing your bike is as easy as abc.key features quick and easy to attach to roof bars, 't' adaptors are included for squared bars art 875 is needed as optional the 360° rotation of the arm head means it easier to attach in many different points and allows you to mount the bike facing either direction the automatic locking system makes this ideal for carbon frame bikes the arm system has an adjustable clutch mechanism to hold it in the right place whilst you load your bike works with 12” to 29” frames and frames from 22 to 50 mm dia. Track in aluminium and the same in anti scratch paint wheel holders have easy to use ratchet straps secure locks bike to carrier and carrier to roof bar rubber protection at all contact points, frame to grab arm, wheels to holders and carrier to bars tuv gs and iso 111542006 quasi static test approval for bikes up to 20 kgfeatures material rail aluminium arm steel max number of bikes 1 bike fitment frame max individual bike weight kg 20 max size frame section mm 50 on frame, universal under saddle max width bike wheel 70 disc brakes compatible ok wheel support length mm 1250 max carry bar width mm 80 for bars over 80 kit for t bars included t section adaptor compatible included downhill accessory compatibility art.407 no locking bike to rack ok locking rack to car ok product size mm 1363310 product weight kg 4.7buy peruzzo accessories from chain reaction cycles, the world's largest online bike store.