Editor's note: The second part of a two-part series on digital tire management programs explores psi and tread depth. Read part one. According to federal regulations, a commercial motor vehicle cannot ...

It used to be that just a simple tread depth gauge or a coin was used to measure the remaining rubber on tires, but now there is new technology to give retailers a much more precise look at treadwear.

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Tires play an important role in your vehicle's performance. Find out how to tell when it's time to swap them out.