Traxxas Unlimited Desert Racer Rear Ring Gear & Pinion Gear Set

For reference information, the ring gear in this kit is exactly the same as the front diff ring gear on the UDR. The only difference between the two sets is the pinion gear. The gears don't last as long as I would like. The sintered metal isn't as strong as machined and hardened steel. But with proper shimming and throttle discipline, you get decent life out of them.