This product is a 27-tooth Mod 1 pinion gear designed to deliver efficient power transfer and optimized gearing performance for high-powered RC vehicles. It is precision-machined from hardened steel to provide exceptional strength, durability, and resistance to wear under high-torque conditions. The 5mm bore ensures secure fitment on compatible motor shafts for consistent drivetrain efficiency. It is compatible with Traxxas models that use part 6480R, including X-Maxx and other platforms requiring a 5mm bore Mod 1 pinion gear for direct factory installation.