So it's the time of year and I took out my winter tires today to take a look at them and get them mounted in the next week or so. To my horror, there's a fairly large gash in the sidewall. I am well aware that this tire should not be ran. The shop did not tell me of this damage when they took them off and put my summer tires on, which they clearly should have to cover their own asses and therefore has raised my suspicions. It looks as though the damage might have occurred while they were trying to get the tire off, this is only a hunch that you may be able to confirm or deny. It was on the inside facing part of the tire, odd if you ask me. More than anything, I'd like to have some idea of what to say before I go in there and ask for them to buy me a new tire. And if you think it isn't damaged by unmounting, is it fixable? It doesn't go all the way through but fairly deep. In the first picture where the gash is compressed, it looks like there was a point of entry, possibly by a tire lever? Thanks in advance for your advice.