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 alternativesHexagonal spacer mounts used to raise roller positions, space out double FRP stay setups, and other custom mounting jobs on a Mini 4WD chassis. Screw holes at both ends allow parts to be attached at either side of the mount, and the hexagonal cross-section keeps it from spinning under load.
Tamiya's compatibility listing for this mount set spans the same nineteen chassis as the FRP Multi Roller Setting Stay — Type 3 through the current ME chassis — with Type 1 needing extra fitting work as already noted. A common use for the hex mounts is stacking two multi-roller setting stays with a gap between them, widening the roller stance further than either stay could manage alone; the hexagonal cross-section is what stops the mount twisting under the sideways load the rollers place on it mid-corner.
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.