The inches used to describe tire size refer to the diameter of the tire’s rims, and the recommended size of tires should always be used. Discover how tire sizes work and how wrong sizes can be detrimental with tips from a mechanic in this free car-care and automotive maintenance video. Expert: Richard Goms Bio: Richard Goms has been researching genealogy as an amateur and a professional for the last 32 years. Filmmaker: Michael Burton

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