This Delrin spur is a direct-fit replacement intended for the HPI Savage 21 drivetrain. The gear carries 53 teeth as indicated in the product title and is designed for RC-scale driveline use only.
Delrin (acetal) is selected for consistent wear and low friction at gear interfaces; when fitting this spur confirm pinion engagement and centre-mesh before full operation. Supplied as 1 pcs for part replacement or maintenance.
Correct mesh and minimal backlash ensure efficient power transfer and limit premature wear on motor pinion and bearings. Check wave washers, bearing play and retention hardware as part of routine service checks.
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