A mild stretch can be performed with a regular tire machine. A extreme stretch will require the use of a bead blaster which will punch the sidewalls out. We will have our machine within a month, but places like Discount Tire can perform stretches.
They told me that my 17x9 wouldnt fit the celica lol. I'll try them though. It's a 215/40/17 on a 17x9 rim so the stretch won't be too bad. I'm just afraid that I'll drive all the way out there and they give me that you wont turn out of our garage speal again. Thanks for the info.