The Fix4Bike coupling is characterised by an innovative fastening system that fits snugly around the ball head of the trailer coupling. This means that the bike carrier can be fitted and fastened particularly easily and securely with just one movement. This guide system with two lateral bolts on the ball neck ensures a very simple and stable connection between the coupling and carrier. It is specially designed for FIX4BIKE trailer couplings, making it much easier to attach and detach the bike carrier.