Using underdrive gears in the rear end makes the rear tires rotate slower than the front

5 4 :1 * Top Speed : 40km / h Run Time : 15 min

keeping things just as accurate

It also includes instructions to re-assemble it into a 4WS model with steerable rear wheels

Hot Racing Dual Pickup Rudder Blade for the Traxxas Spartan FEATURES CNC Aluminum construction

HPI Racing - HPI Roto Start 2 System (Starter Unit) fits Savage X 4.6 Tamiya Using underdrive gears in theGenuine HPI quality spare part to provide easy maintenance and repairs for the HPI Roto Start 2 System. Requires a 7. 2V rechargeable "Stick" battery pack and charger Engine back plate is not included