G4R (ROAR) Motor Timing & Gearing Guide

Race-Tested by the HOBBYWING Spec Race Team (13.5, 17.5, and 21.5)

Motor timing and gearing are two of the most powerful tools you can use to fine-tune performance on the track. Our team has tested the HOBBYWING G4R motors across every major platform using the HOBBYWING Tunalyzer, gathering proven data to help you get dialed in fast. Whether you're on carpet, dirt, on-road, or off-road, this guide gives you the edge.

All timing recommendations are based on the Option Rotor (Part #30820407). The option rotor has a slightly stronger magnetic field. If you’re using the Standard Rotor (Part #30820450)—a weaker magnet—expect to use lower timing to achieve a similar RPM range.

G4R Timing Recommendations

Gearing Recommendations

Carpet Gearing

Clay Gearing

Touring Car Gearing

1/12 Pan Car Rollout

Rotor Comparison – Option vs. Standard

The option rotor provides more torque and allows for more timing. The standard rotor has a softer magnetic field and typically requires less timing and more gear to reach similar RPM.

Tuning Notes

• Timing: Higher timing increases RPM and heat. Lower timing provides smoother power delivery and cooler temps.

• Final Drive Ratio (FDR): Lower number = more top speed. Higher number = more torque.

• Rollout (1/12 scale): Measures how far the car moves per motor revolution.

• Taller Gearing: More top-end speed, softer launch.

• Shorter Gearing: Stronger bottom end, lower top speed.

Final Thoughts

This guide is designed to give you a fast, proven baseline for G4R tuning. These setups are used by our team across top-tier events and have been validated on the track. Use this as your starting point, adjust based on temperature and driving style, and you’ll be up to speed in no time.

Have questions or need help getting dialed in? Reach out to us or connect at the track.