Reinforced wheel bearings for the 14" and 16" 3-spoke/4-spoke and 17" 5-spoke cast rim. Not suitable for classic Piaggio spoke wheels! The 6002 dimension of these wheel bearings has a positive effect on the stability of the front wheel and vibrations are reduced. The original 11mm axle is still used with this upgrade kit, in addition the supplied aluminium spacer tube is installed. The service life of the front wheel bearings is increased.