My car is at the shop and while they were test driving it after all of the mods added, they ran over a razorblade and blew a tire.

I have Toyo Proxies 245 / 40 R18 on there.

So, I can't just replace one tire, correct? Can I replace in pair (if not a single)? Do I need to replace all four?

BTW: My car is a 1994 Dodge Stealth R/T Twin Turbo

Thanks!