XRAY NT1 19T Pulley Replacement XN1-41 by 3Racing  [XN1-41]

19T precision pulley for NT1 belt systems

This 19-tooth aluminium pulley is produced as a direct replacement geometry for the XRAY NT1 drivetrain, intended to alter belt engagement characteristics while maintaining original mounting and alignment dimensions. The design retains the OEM tooth count and form factor for straightforward integration into NT1 belt routes.

Fitment is intended to be identical to the stock pulley location on the NT1; installers should verify axial alignment and belt tracking after assembly. Confirm the pulley seat and fasteners match existing hardware and apply correct torque values to avoid slippage or misalignment during operation.

From a tuning perspective, changing pulley material or tooth count alters the drivetrain's rotating mass and belt geometry, which can lead to measurable but incremental shifts in belt tension and vehicle response under acceleration and during corner exits. Use this component as a controlled variable when refining setup parameters for consistent lap-to-lap behaviour.

For competitive builders seeking a compact 19T aluminium replacement that preserves NT1 layout and allows measured changes to driveline engagement, XN1-41 is a practical choice for setup tuning.