XRAY NT1 Pinion 2nd Gear 21T Hard Coated 7075 - Arrowmax AM-NT1-338521  [AM-NT1-338521]

Aftermarket 2nd gear for the XRAY NT1

The Arrowmax AM-NT1-338521 2nd gear is a precision drop-in pinion made from 7075-T6 aluminium with a hard treated surface to improve wear resistance in track conditions. It is produced to suit XRAY NT1 spur geometry and for use in RC competition drivetrains.

Fit this gear when you need to alter the final drive or replace a worn second gear; changing the tooth count shifts the balance between acceleration and top speed so keep records of stock and new tooth counts for tuning reference. The available range includes 16T to 23T for gradual ratio adjustments without changing other drivetrain elements.

Installation guidance: install the gear on the NT1 second shaft, ensure concentric seating and correct axial placement, then set pinion-to-spur mesh to a minimal, even clearance across the tooth face to reduce premature wear. Perform a short break-in at moderate loads after fitting and re-check mesh and fastener torque before full-power running.