Mini 4WD Setting Gear Set: AR (15456) vs FM-A (15516)
Tamiya 15456 and 15516 bundle five gear ratios, 3.5:1 to 5:1, but fit different chassis. Compare contents, price and fit before buying the wrong set.
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Tamiya Setting Gear Set (for FM-A Chassis)(15516)
USD11.15
USD8.92
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Description
A drivetrain rebuild set for the FM-A chassis, bundling a complete gear set with a ball bearing and propeller shaft so the whole gear train can be serviced or reconfigured in one purchase rather than sourcing each part individually. The same gears also fit the older Super X and Super XX chassis.
- Includes a full gear set, ball bearing, and propeller shaft
- Compatible chassis: FM-A, Super X, Super XX
Tamiya labels multi-part drivetrain rebuilds like this one "Setting Gear Sets" because they bundle a full gear train rather than a single ratio, letting racers swap between the included gears to balance top speed against acceleration and hill-climbing torque for a given track. The FM-A chassis it targets underpins kits such as item 18707, Rowdy Bull, and the shared gear tooling is also why the same parts carry over to the older Super X and Super XX chassis.
Related guides
All guides →
Mini 4WD Gear Set Compatibility Guide
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.
FM-A Chassis Mini 4WD Kit Guide
Choose a Mini 4WD FM-A chassis kit with front-motor handling in mind. Confirm the body, parts fitment and event rules before planning a setup.