XRAY RX8 18T Aftermarket Pinion by Arrowmax AM-RX8-348518  [AM-RX8-348518]

Precision pinion for RX8 compatible cars

The Arrowmax AM-RX8-348518 18T pinion is an aftermarket motor pinion intended for use with the XRAY RX8 chassis. Manufactured from 7075-T6 aluminium and given a hard surface treatment, it provides a lightweight, wear resistant option where RX8-compatible pinions are required.

Fitting a different pinion lets you tweak final drive ratio to tune motor load without changing the spur gear. The hard-coated 7075 alloy reduces rotating mass while helping resist surface wear, and the tooth geometry is made to mesh smoothly with RX8 spurs when mesh is correctly set.

Arrowmax lists this type across several tooth counts including 16T through 21T so you can adjust gearing in fine steps. When swapping pinions on an RX8 platform, check shaft compatibility and re-evaluate mesh under suspension travel and steering throw to avoid excess wear.