The Awesomatix A12 Gear Diff is specially designed for the use in the Awesomatix A12 1/12 Scale Pan Car. With the 1/4" main shaft, this Gear Diff is also suitable for most other brand 1/12 Scale Pan Car's. This Diff is suitable for standard TC and 1/12 spur gears of many brands. The overall weight is class leading with only 21g. to ensure the best performance on the track.