I've got a set of aftermarket wheels (16" TSW Trophies on Toyo Proxes FZ4's. Don't laugh, they came with the car). The problem is that it didn't come with a spare tire, and I'm worried about what I would do if I got a flat. Since I'm a cheap mofo, I was wondering if I bought a stock spare tire and used that if it'd be ok, or if there would be some damage if used it?

Yeah, you can use a donut with it.

BTW, I like trophy's, they're awesome. And not as common as a lot of other wheels are.