batman wrote on 02/20/20 at 00:14:47: If the belt isn't adjusted to tight it should last at least a 100,000 miles. Read up on it here on the site , don't use the gauge in the tool kit (toss it) it sets the belt way to tight.
My first one snapped at 75,000. I have also replaced them because of a hole from a rock (probably would have been ok), and deep cracks that I just didn't feel good about. Can't speak to the actual mileage on the last 2, as I bought used belts on ebay.