XRAY NT1 Aluminum Pulley 18T by 3Racing XN1-40/RE  [XN1-40/RE]

Precision 18T pulley for NT1 tuning

This is an RC-scale 18T aluminum pulley produced by 3Racing intended for use with the XRAY NT1 chassis. It serves as a direct replacement pulley for NT1 drivetrains where the pulley tooth count and material matter for drivetrain feel and wear.

Compatibility is limited to the NT1 chassis family referenced in the original product name. The part is designed to interface with standard NT1 spur and belt arrangements; do not attempt to use it on unrelated chassis without verifying fitment.

Installation is straightforward for hobbyists familiar with NT1 layouts. Typical steps include removing the original pulley, checking shaft and bearing fit, and securing the replacement with the original retaining hardware. Verify alignment and free rotation before running the motor.

• Check shaft diameter and bearing clearance before installation.
• Use thread locker on retention hardware only if the original assembly uses it.
• Inspect mesh and belt/runout after installation to avoid premature wear.

In tuning terms, swapping to an aluminum pulley of the specified tooth count is a way to maintain consistent gear engagement and predictable belt tension behavior during setup changes; treat it as a precision replacement rather than a performance modifier.