Traxxas 8181-BLUE Tires & Wheels Canyon Trail/TRX-4 Black 2.2" Blue (2)Traxxas Unlimited Desert Racer (UDR) with LED Set RED RIGID The Traxxas Unlimited Desert Racer (UDR) is engineered on an true to scale fourwheel drive desert race truck chassis. The 4 link solid rear axle design provides massive suspension travel with true authentic driving dynamics. With the UDR, Traxxas is introducing a new Traxxas innovation called Pro Scale that captures true scale realism and combines it with extreme 6s LiPo power and 80+ kph