The TKR5154M SCT410 2.0 Differential Ring Gear (40T) is a replacement ring gear used in the Tekno RC SCT410 2.0 platform, and it is also compatible with related Tekno 1/8 scale vehicles that share the same differential system, including the MT410 2.0 and SCT410-based drivetrain setups. It is part of the front or rear differential assembly and works with the internal diff gear set (TKR5153M) to transfer power from the driveshafts to the axles. This 40-tooth steel ring gear is designed for high durability and precise gear mesh under racing and high-load off-road conditions, making it a direct-fit OEM replacement for rebuilding or maintaining SCT410 2.0 differentials without modification.