Sub wheels

So I'm looking for a used Sub. I've found a few with 20" wheels which I don't care for. I'd like a rig with standard wheels/tires. What is the standard size?

I ran into a used 05 that has 17" factory wheels but I though the standard size were 16". Are 16-17" tires going for about the same price. Does one perform better than the other?

Thanks for your help,
1Slugger

My '04 came with optional 17" wheels. Standard is 16". 17" tires cost a bit more but I like the look without compromising the ride like a 20" would.

Well I lucked out and found a better 04 yesterday that came home with me. Had new tires on the "upgraded" 17" wheels. Looks like I'm good to go for rubber for now.
Slugger