A convenient solution to protect your bike from quick theft in one easy step. Just like our frame lock 4750, which has been specially developed for wheels with a large wheel passage.8.5 mm steel shackleThe case, the shackle as well as supporting elements of the locking mechanism are made of specially hardened steelExtreme large aperture for extra wide tires (89mm internal measurement)Closing mechanism for easy attachment of accessory to the lock bodyThe NR (non key retaining) version allows taking the key out of the cylinder