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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Tamiya Mini 4WD High Speed EX Counter Gear Set (Gear Ratio 3.7:1)(15434)
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Description
This counter gear set puts the drivetrain at a 3.7:1 ratio, sitting between Tamiya's High-Speed Gear Set (4:1, more torque and acceleration) and the Super Speed Gear Set (3.5:1, more top speed), making it a middle-ground option for balancing acceleration against straight-line speed. It fits Super TZ, TZ-X, Super X, Super XX, VS, and Super II chassis machines, and Tamiya's full compatibility listing also extends to FM-A and AR chassis. As with Tamiya's other higher-ratio gear sets, it is intended to be run with small-diameter tires so the extra ratio translates into a real speed gain rather than simply overgearing a large-diameter wheel. Released in September 2011 as Grade-Up Part No.434, it remains one of the more popular middle-ratio swaps for racers who find the stock gearing too slow but the 3.5:1 Super Speed set too twitchy off the line.
- Gear ratio: 3.7:1
- Compatible chassis: Super TZ, TZ-X, Super X, Super XX, VS, Super II, FM-A, AR
- Recommended pairing: small-diameter tires
- Mini 4WD Grade-Up Parts No.434
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