Specially-modified high-performance 351mm-long and 3mm-wide drive gear. This belt is quite slim and elastic possible for an exceptionally effective transmission that dramatically decreases friction and helps to reduce battery pack draw. The gear is specially hand ground on a particular machine for minimal thickness and flexibility, without impacting lifespan. To totally take pleasure in the advantages of these superior belts, make sure all transmission ball-bearings are positively clean to reduce drag and friction.