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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A pack of ten G-13 gears in pink, a Mini 4WD gearbox component sold as a maintenance replacement so worn or fatigued gears can be swapped out individually to keep a chassis's drivetrain performing consistently.
Tamiya identifies its Mini 4WD gearbox gears with a letter-and-number code like G-13 rather than a full descriptive name, the same convention it uses across the AO spares range so the same numbered part can be ordered for any chassis that shares that gearbox architecture. Gears inside the gearbox mesh constantly under load every time the car runs, which wears them faster than most other drivetrain parts and is why Tamiya packages this one as a set of ten rather than a single spare — enough to refit a gearbox more than once, or to keep spares on hand for race-day repairs.
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.