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

Pinion Gear for XRAY RX8

This Arrowmax AM-RX8-348519 pinion is a dedicated RC-scale replacement part produced for the XRAY RX8, built to serve as a direct-fit motor pinion for clutch and gearbox setups on that chassis.

Manufactured from 7075-T6 aluminium with a hard coating, the tooth profile is cut to match XRAY spur gears for reliable mesh. Arrowmax offers this design across a range of teeth counts including 16T, 17T, 18T, 19T, 20T and 21T so you can change gear ratio by swapping pinion sizes without altering the spur.

Installation notes: confirm correct mesh and axial alignment before running, use proper shims or a pinion spacer as required by the RX8 motor mount, and secure the pinion with the original set screw torque. Minor adjustments to mesh and backlash will affect wear and drivetrain noise, so check after a short test run.

Tuning role: changing the pinion teeth alters acceleration versus top-speed balance; smaller teeth favour acceleration, larger teeth favour higher top speed. Use incremental steps when testing changes and inspect the pinion and spur for wear periodically, replacing as needed to maintain smooth operation.