Traxxas Revo 39T Delrin Spur Gear RE-031 by 3Racing  [RE-031]

Traxxas Revo Delrin Spur Gear 39T - 3RACING RE-031
Price:
USD$6.82
Brand:
3Racing
Model:
RE-031
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Precision Delrin spur for Revo setups

The RE-031 is a 39-tooth Delrin spur produced as a precise aftermarket replacement for the Traxxas Revo spur location, offering consistent tooth engagement and improved wear characteristics compared with many stock plastics. Its acetal construction supports stable mesh under typical RC running loads while limiting noise generation.

Installation requires standard gearbox alignment and careful mesh adjustment: mount the spur to the gearbox output, set the pinion-to-spur clearance, and fine-tune with shims or motor mount repositioning if necessary to remove backlash. Verify concentricity and bearing play after initial operation.

For competitive tuning the RE-031 should be specified as a service and ratio-swap component rather than a primary power upgrade; maintain lubrication and bearing support to ensure longevity and avoid accelerated wear on mating metal pinions.

What gear ratio changes are possible with a 39T spur?

Swapping the spur alters final drive ratio; pairing a 39T spur with different pinion tooth counts adjusts acceleration versus top speed—plan ratios to match motor and track conditions.

Any fitment checks before running on a race car?

Confirm the spur seats flush on the gearbox output, check for axial runout, ensure bearings are tight, and perform a short break-in to detect any irregular engagement.

Recommended maintenance schedule?

Inspect gear teeth and bearings after each major session, reapply light grease as needed, and replace the spur if you observe chipped teeth, persistent chatter, or irregular wear patterns.