This Delrin spur gear is a direct-fit accessory produced for the HPI Savage 21 platform, supplied as a single replacement unit. The 53-tooth count is stated in the product name and the component is intended for RC-scale driveline use only.
Delrin (acetal) offers predictable wear characteristics and low friction in drivetrain interfaces; when replacing the main spur, confirm pinion engagement and centre-mesh distance before operation. Sold as 1 pcs for part replacement or maintenance.
The gear's role in tuning is straightforward: correct mesh and minimal backlash preserve power transfer and reduce premature wear on the motor pinion and associated bearings. Check wave washers, bearing play, and spur retention hardware during any service interval.
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