The 5.9mm ball bearing is build using a special steel SUJ2 from Japan. This high quality ball bearing improves the smoothness of the gears which helps to decrease the power consumption of the batteries.

These generally require a level of technical skill to fit properly so we do advise you have it fitted by a competent technician.

Any questions on compatibility, installation or if you would like one of our in house techs to fit the parts for you, please email us on [email protected] or call us on 01293 525880