Specially-modified high-performance drive gear. This belt is fairly slim and elastic as you can for an incredibly effective transmission that considerably decreases friction and assists to lessen battery pack draw. The belt is very hand ground on a specific unit for minimal level and freedom, without impacting lifespan. To totally benefit from the benefits from these high-performance belts, ensure all transmission ball-bearings are definitely clean to lessen drag and friction. Fits X4F
