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.
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Browse available alternativesCosmosonic is driven by Retsu Seiba in "Let's & Go!! Return Racers!!" and takes visual cues from earlier cars in the Sonic lineup, with an aerodynamically sculpted, predominantly red body (via the included metallic stickers) and a distinctive rear wing.
It sits on the black-molded FM-A chassis, sharing the range's front-motor layout, low-friction front skid bar, four rollers including 8mm-thick rear rollers, and aero side stays for Grade-Up parts. Yellow A-spoke wheels are fitted with small-diameter low-profile tires, and the gear ratio is 3.5:1.
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.
The Mini 4WD FMA chassis puts the motor up front, which changes braking and jump attitude completely. Tuning around that forward weight bias.
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.