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

Precision 18T pulley for NT1 tuning and service

This 18T aluminium pulley is supplied as a direct replacement for the XRAY NT1 chassis family and is engineered to maintain consistent tooth engagement and predictable belt tension in NT1 spur and belt systems. It is intended for accurate replacement use and routine tuning work.

Compatibility is limited to NT1-spec drivetrains referenced in the product title. Confirm shaft interface and pulley dimensions before applying this part to other chassis.

Installation follows standard NT1 procedures: remove the existing pulley, inspect shaft diameter and bearing clearances, fit the replacement using the original retention hardware, and verify alignment and free rotation prior to powering the motor.

• Verify shaft diameter and bearing clearance before installation.
• Use thread locker on retention hardware only when specified by the original assembly.
• Inspect gear mesh and belt runout after fitting to prevent premature wear.

From a technical viewpoint, replacing an NT1 pulley with the specified 18T aluminium unit preserves the intended tooth profile and belt behaviour, supporting repeatable setup changes and predictable drivetrain response.