Upgrade your Tekno RC drivetrain with the TKR4171 "M5" hardened steel Mod1 pinion gear (11T) with 5mm bore. Constructed from strong, hardened steel, this gear delivers precision, durability, and long-lasting performance for racing and off-road use. Compatible with Tekno RC models including ET48, EB48, and SCT410 series, it ensures smooth gear meshing, efficient power transfer, and reliable drivetrain operation. Enhance your RC vehicle for improved acceleration, consistent speed, and optimal overall performance with this high-quality pinion gear.