All that technical nonsense on the car and when the tire goes soft they tell you to use a pencil gauge in the tires. Actually, you should check your tires every time you fill up or every second fill-up, but we rely on technology because we've all gotten too fat and lazy. However, technology reminds us that "this number may not be accurate. Use a pressure gauge." What you should do first. it's a tire shop. It works. Check the damn tires.
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