When the tread reaches 2/32-inch depth, the indicators will be completely flush with the tire.Īt that moment, you should immediately replace the tires since wet traction and grip will be severely worsened. These are narrow rubber bars that sit recessed into the tread grooves, which you can use to monitor the tread depth left.Īs the tread wears down, the TWIs will become more visible, signifying that you might soon need to replace the tires. Thus, if you own a performance car, you might want to check the run-flat versions of Bridgestone’s Potenza family of tires.Īs far as maintenance indicators go, the DriveGuard comes with the usual TWIs (tread wear indicators). Please note, though, the DriveGuard is a grand-touring all-season tire, so it’s not made for performance driving. Specifically, the DriveGuard comes in sizes ranging from 15-inch to 20-inch wheel diameter, hence covering the most popular vehicle types, such as compact cars and crossovers, sedans, minivans, and coupes. With this move, Bridgestone wanted to make the run-flat technology available for everyone, not just vehicles that come with such tires from the factory. It is available in the most popular sizes, meaning it will fit most vehicles running on public roads today. The DriveGuard is the most readily available run-flat tire on the market.
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