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

Steel spur gears for 1/5 ARRMA

This aftermarket spur gear set is a direct-use RC-scale replacement produced by GPM 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 are intended to substitute the factory spur gear referenced in the source listing, and present a steel option where increased wear resistance and dimensional stability under load are required.

On fitment and role: these spur gears are designed for the ARRMA 1/5 Kraton and Outcast models listed in the compatibility section below. Choose the tooth count based on the drivetrain ratio you want to test—lower tooth counts reduce driven ratio for quicker acceleration, higher counts raise the driven ratio for increased top speed potential. Confirm the 1.0 Mod pitch and tooth count match your pinion and gearbox before installation.

Installation notes: verify mesh with the motor pinion and inspect mating surfaces and bearings for wear. Set a consistent backlash and check the gearbox for smooth rotation before tightening hardware. Use appropriate grease on gear faces and avoid over-tightening screws that could deform the gear carrier or affect mesh alignment.

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.