3Racing 64 Pitch Spur Gear 91T Ver.2 - 3RAC-SG6491/V2 Racing Spec  [3RAC-SG6491/V2]

3RACING 64 Pitch Spur Gear 91T Ver.2 - 3RAC-SG6491/V2
Price:
USD$4.40
Brand:
3Racing
Model:
3RAC-SG6491/V2
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Race-Focused 64 Pitch Spur for Tuned Drivetrains

The 3Racing 64 Pitch Spur Gear 91T Ver.2, model number 3RAC-SG6491/V2, is engineered to support fine tuning of gear ratios and mesh settings. The 91 tooth 64 pitch profile helps deliver stable engagement under frequent load changes common in racing.

Set Up for Competitive Performance

When dialling in gear ratios, this spur gives a repeatable tooth form that helps with consistent lap times. Its design supports tight mesh tolerances to reduce backlash and preserve motor output efficiency.

Tuning Notes and Fitment

Compatible with 64 pitch drivetrains used in many 1/10 race platforms, the spur is suitable for teams and drivers refining their pinion choices to match track conditions and motor characteristics.

What pinion ratio changes are common with a 91T spur?

Teams often test a range of pinion tooth counts to balance acceleration and top speed; small steps help identify optimal traction and motor load for specific track layouts.

How should I monitor gear wear during race meetings?

Check contact pattern, tooth edges, and any burrs between heats. Replace the spur at the first sign of irregular wear to protect the pinion and gearbox internals.

Any mesh setup recommendations for minimal noise?

Aim for an even, close mesh with a hairline clearance. Use a single sheet of paper to set initial mesh, then tighten and recheck after a brief run to confirm stability.