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

Accurate 18T pulley for NT1 belt and spur setups

This 18T aluminium pulley is intended as a direct replacement for the XRAY NT1 chassis, matching the tooth count and structural role of the original pulley in NT1 spur and belt systems. It is supplied for fitment and reliability rather than to change gear ratios.

Compatibility is restricted to the NT1 family named in the product title. Verify compatibility with your NT1 variant and confirm shaft and mounting dimensions before installing on other models.

Installation is simple for users familiar with NT1 builds: remove the existing pulley, inspect shaft and bearing clearances, and secure the new pulley with the original retention hardware, then check alignment and free rotation.

• Measure shaft diameter and bearing clearance ahead of fitting.
• Use thread locker only if the original assembly required it.
• Check mesh and belt runout after installation to avoid uneven wear patterns.

For tuning, swapping to an aluminium pulley keeps engagement consistent and belt tension behaviour predictable during setup changes; use it as a precision replacement part.