XRAY RX8 19T Pinion Gear Upgrade - Arrowmax AM-RX8-348519  [AM-RX8-348519]

High-Precision Pinion for the RX8

The Arrowmax AM-RX8-348519 pinion is an RC-scale replacement created specifically for the XRAY RX8, intended as a direct-fit motor pinion in clutch and gearbox configurations on that chassis.

Produced from 7075-T6 aluminium with a hardened surface, the gear teeth are profiled to match XRAY spur gears for consistent mesh. Arrowmax offers this pinion across 16T, 17T, 18T, 19T, 20T and 21T options so you can adjust the overall gear ratio simply by swapping pinion sizes.

Installation advice: check mesh and axial position before running, use necessary shims or a dedicated pinion spacer for the RX8 motor mount, and fasten the pinion screw to the specified torque. Even small changes in mesh or backlash will alter wear rates and noise, so verify after a short practice run.

Tuning note: varying the pinion tooth count alters acceleration versus top speed balance; smaller pinions improve initial punch while larger ones increase top-end. Make incremental changes and inspect the mating spur and pinion for wear after testing.