Gates GT4 Primary Belt 640-8MR-25MM Mxp_designs this kit features high-quality deep

this kit features high-quality deep groove ball bearings built to handle radial and lateral loads from aggressive trail riding

160/60-17 Rear

25 set is the ideal upgrade for Ultra Bee owners looking to elevate their riding experience

this sprocket is designed to withstand the abuse while delivering consistent drivetrain performance

Customizable Ergonomics:

Gates GT4 Primary Belt 640-8MR-25MM Mxp_designs this kit features high-quality deepThe Gates PowerGrip GT4 640 8MR 25MM Primary Belt is a direct OEM replacement and performance upgrade for the Sur Ron Ultra Bee. Designed specifically for the flanged primary pulley system, this 25mm wide GT4 belt delivers increased torque capacity, stable tracking, and long service life for stock and high power builds. Developed through GritShift R&D with Gates engineers. Manufactured in the USA. Fitment: Sur Ron Ultra Bee The PowerGrip GT4