So in the coming few years on the question whether or not to change your tires, a suggestions for shops in your area will come with a recommendation to change them. Do you think you would trust the outcome?
My mechanic takes a video of a tire tread depth gauge being inserted into each wheel and reports the values, when doing the initial inspection and tests before every oil change.
It's something that can be empirically measured instead of visually guessed at by a human or magic eight-ball. Using a tool that costs only a few dollars, no less, like the pressure gauge you should already keep in your glovebox.
