XRAY NT1 Competition 2nd Gear 21T 7075-T6 by Arrowmax AM-NT1-338521  [AM-NT1-338521]

NT1 second gear replacement part

The Arrowmax AM-NT1-338521 2nd gear serves as a direct replacement pinion, machined from 7075-T6 aluminium and finished with a hard coating to resist wear in competitive running. It is produced to the XRAY NT1 spur profile for correct engagement in that chassis.

This gear is intended for final-drive adjustments or to replace a worn second gear; changing tooth count will alter acceleration and top-end balance so track stock and new tooth counts when tuning. The product family spans 16T through 23T to allow small ratio changes without modifying other drivetrain items.

Fitment notes: slide the gear onto the NT1 second shaft, verify it is concentric and correctly located axially, then set a minimal, even pinion-to-spur mesh to prevent premature wear. After fitting, carry out a controlled break-in at moderate loads and check mesh and fastener torque again before high-power use.