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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The Setting Gear Set for AR Chassis is a gear-ratio upgrade part for Tamiya's AR Chassis, letting builders swap the stock final drive for one of five ratios to match a track's balance of straights and corners. A lower ratio such as 5:1 favours acceleration and hill climbs, while a higher ratio such as 3.5:1 favours top speed on long straights. The set also supplies a 1.4mm-diameter hollow lightweight prop shaft and a 620-size ball bearing, both direct replacements for the AR Chassis's stock parts.
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.
A close look at Shadow Shark's AR chassis, distinctive shell, included wheels and the gear-ratio discrepancy in Tamiya's own product pages.
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.