Traxxas 6779 Rear Ring Gear, Diff, Pinion Gear, Diff 12/47 This is the Traxxas Rear Ring Gear, Differential, and Pinion Gear with a 12/47 Ratio for the Stampede 4x4.Features:Black colored Made of tough SteelFor the Traxxas Stampede 4x4Includes:One Traxxas Rear Ring Gear, Differential, and Pinion Gear with a 12/47 Ratio for the Stampede 4x4Requires:Installation to vehicle