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RC Glossary


New to the RC Hobbies? What does buggy, bulkhead, nitro mean in radio control car hobbies? Check out the glossary for remote control cars below.

Diff Balls (Ball Differentials) --

A differential that uses a series of steel or carbide-steel ball bearings in a circle, pressed between two metal rings, to provide the differential action, allowing one wheel to rotate more than another in a turn. Ball diffs are easier to adjust than gear diffs but are harder to maintain, as they need checking every day of running and are not recommended for Nitro racers. Normally a screw on one side controls the tension between the metal rings, which controls how much the outside wheel in a corner can turn. The looser (to a point) a diff is, the more traction there is at that end of the car. To start tuning your car, set the ball diffs to the same tension at each end, and use the diffs only to fine-tune the car. Do not change the settings of your diffs first. The most common sizes of diff balls are 5/64 and 3/32.
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