Yeah Racing Spring 2 front & rear Urethane drive belts
Coming from Yeah Racing and made for HPI Racing’s Sprint 2 touring car are front and rear Urethane drive belts. 4mm wide and made from Urethane material the belts are meant to improve drivetrain efficiency with the belts being available separately for the front or the rear of the car.
Source: Yeah Racing [yeahracing.com]