Related topic - always pay the extra 10% for the tire insurance at Discount Tire; I can't believe they aren't losing money on this.
We once got the tire policy included at no cost during a promotion. Got a flat that I couldn’t plug. I measured the tread with my treadwear gauge and unsurprisingly, their measurements came up short. When I pulled out my gauge and insisted we go out to check them, low and behold it turns out the tech had “made an honest mistake”.
Bonus points; I drive an AWD vehicle that requires replacement of all 4 tires if tread is too worn. When this happened I only had to pay prorated on the other 3... definitely paid for itself every time!
(We also have nasty roads in my state, fwiw...)