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.
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Browse available alternativesScrew Set A is a general-purpose hardware pack for Mini 4WD tuning work, covering common jobs such as raising roller mounting positions or building double stays for extra rigidity. It's intended as a stock of assorted screws for the kind of small modifications racers regularly make to a chassis.
Because it's simply an assortment of fasteners rather than a chassis-shaped component, Tamiya lists it as compatible with essentially its entire Mini 4WD lineup, from the original Type 3 chassis through current releases. It differs from the companion Screw Set B (No.233) in being described as a general assortment for whatever job comes up, rather than a fixed breakdown of specific screw lengths and nut counts — useful as a running stock of spares for a racer who's regularly drilling, raising rollers or adding stays rather than following one fixed build plan.
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.
Hyper-Dash 3 (15477) is Tamiya's usual Mini 4WD race motor: 17,200-21,200 RPM, 1.4-1.9 mN·m, 1.6-3.0 A. Gear pairing, the PRO twin, and J-CUP 2026.
Ultra-Dash (15307) publishes 24,000-27,500 RPM and 4-5 A. Why official Tamiya races exclude it, what it does to AA cells, and when a club may still allow it.