Mini 4WD Gear Ratio Chart: Choosing by Course
A Mini 4WD gear ratio chart from 3.5:1 to 5:1, explained by course type. Match your gear set to motor, straights and corners before race day.
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This spare gear pack contains one G-6 gear (30-tooth, light green) and one G-10 gear (24-tooth/18-tooth, blue), the pairing that makes up a 5:1 reduction ratio in Tamiya's Mini 4WD gearboxes. Sold as a matched pair, they mesh together to set final drive speed and are compatible with a wide range of Mini 4WD chassis. Useful for replacing worn or chipped teeth, or for building a spare gearbox without stripping down an existing car.
Tamiya's own compatibility listing for this pairing spans Type 2, Type 4, Type 5, Zero, FM, Super-1, Super-II, Super FM, Super TZ, Super X, Super XX, Super TZ-X and AR chassis, making it one of the more broadly interchangeable gear pairs in the catalogue. Because the gears are sold matched, this pack also works as the starting point for pre-building a spare gearbox off to the side, ready to swap in whole rather than stripping the car currently on track.
A Mini 4WD gear ratio chart from 3.5:1 to 5:1, explained by course type. Match your gear set to motor, straights and corners before race day.
Choose a Tamiya Mini 4WD gear set by the exact chassis, motor layout and instructions. Check ratio, gear cover and event rules before changing the drivetrain.
Asking what is the fastest Tamiya Mini 4WD motor misses half the answer. Matching motor torque to gear ratio and track length is what wins races.