How to Select the Tire Size for a RC

Written by matthew cote
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How to Select the Tire Size for a RC
The size of your tires can drastically affect your vehicle's overall performance (rc-modell image by andreas from

Radio-controlled cars have many customisable parts that enable aesthetic changes and variations in the vehicle's performance. Tires are a major part of that performance. RC tires are specifically designed for different terrain. Once you settle on what kind of ground you want to run the vehicle on, the next step is to fit it with the right size of tire.

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  1. 1

    Measure the size of your car's wheel well. This is the space cut out of the body shell that fits around the wheels. Measure the diameter of the wheels to avoid installing a tire that scrapes the body shell.

  2. 2

    Select rims with the same diameter of the tires to help maintain their shape. The rim must be designed to function with your specific vehicle since they are generally categorised by fuel type (battery or nitro) and terrain (on or off road).

  3. 3

    Count the number of teeth on your vehicle's pinion and spur gears. Divide the large number by the smallest to calculate the gear ratio. This number represents how many times the pinion gear spins, per rotation of the spur gear. Pick large tires if your ratio is a small number like 1:2. Pick smaller ones for a large ratio like 1:12.

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