ARRMA 1/5 Kraton & Outcast Spur Gear 39T/43T/47T MAKX039TS by GPM  [MAKX039TS]

20CrMnTi Spur Gears for ARRMA 1/5 Models

This aftermarket spur gear set is a direct-use RC-scale replacement for ARRMA 1/5 platforms. Each item in the MAKX039TS family is manufactured in 20CrMnTi steel and offered in three tooth counts: 39T, 43T, and 47T, all with a 1.0 Mod pitch. The parts act as steel alternatives where increased wear resistance and dimensional stability under load are required.

On fitment and role: these spur gears are compatible with the ARRMA 1/5 Kraton and Outcast entries listed in the compatibility section below. Select the tooth count to alter the drivetrain ratio—fewer teeth deliver stronger acceleration, while more teeth raise the driven ratio for higher top speed potential. Always verify the 1.0 Mod pitch and chosen tooth count match your pinion and gearbox before fitting.

Installation notes: check the mesh against the motor pinion, inspect mating surfaces and bearings for wear, and set a consistent backlash. Apply suitable gear grease to the faces and avoid over-tightening screws that could deform the gear carrier or change mesh alignment. Run the gearbox by hand to confirm smooth rotation before final assembly.

Before fitting, confirm the tooth count and M1.0 pitch match your existing pinion and gearbox, and follow standard gear-mesh setup practices to ensure reliable operation in high-load RC conditions.