The nut is fitted with a protective cover that only releases when the bike is on its side. This means it is not possible to access the nut unless the bike is on its side. The bike can then be returned to an upright position for any maintenance that is needed.

The NutFix™ is ABUS’ innovative solution to preventing component theft. This stylish lock is THE solution for securing bicycle components, including wheels, seatposts and saddles against would-be thieves. Its real strength lies in its design. The nut is fitted with a mechanism that only releases the screw below when the bike is on its side. This means it is not possible to access the screw unless the bike is on its side. NutFix™ is available in several models, including NutFix™ quick release, NutFix™ bolt on axle nuts and NutFix™ Seatpost collars.