XRAY RX8 21T Pinion by Arrowmax AM-RX8-348521 Race Grade  [AM-RX8-348521]

Fine tune your XRAY RX8 with Arrowmax 21T

The Arrowmax AM-RX8-348521 21T pinion is built for XRAY RX8 applications, using 7075-T6 aluminium to balance strength and low weight. Its hard-coated surface helps it stand up to frequent running and heat from high RPM use.

Designed for tight spur gear alignment

Precision cutting ensures consistent tooth profiles so the pinion meshes cleanly with spur gears, cutting drivetrain losses and delivering smoother torque. Multiple tooth options from 16T to 21T let you adjust gearing for grip level and track layout.

Performance benefits of 7075-T6 aluminium

7075-T6 offers a high strength-to-weight ratio that reduces inertia on the motor shaft, improving acceleration response and longevity under racing loads.