The SG-4878S is a 78-tooth 48P spur gear made for use with D-MAX series dual clutch (slipper) setups in 1/10 scale RC cars. It functions as a direct replacement or a tuning choice where a 48P spur is needed, preserving the specified tooth count while letting you fine tune slipper engagement and driveline feel.
Installation is straightforward for experienced hobbyists: verify 48P compatibility between the pinion and the slipper unit, set correct gear mesh to prevent premature wear, and confirm the slipper plate and clutch engagement are adjusted for the vehicle's typical load. Keep the area around the gear clean and inspect mating surfaces and bearings for smooth operation before final assembly.
When tuning, a 78T spur alters the effective gear ratio compared with other tooth counts, changing acceleration and top-speed balance when combined with slipper preload and motor timing. Make small incremental adjustments and perform test runs to arrive at the best compromise between throttle response and drivetrain longevity.
Compatible with D-MAX series dual clutch (slipper) assemblies that use 48P spur gear specifications.
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