im buying 16x8 +15offset spormax 501's and im trying to figure out a good tire size that will have a slight bit of stretch i was thinking 205 45 16. just wondering what you guys think. its going on a 99si

i want it to look like that

 

16x8 rims are too wide for 205/45-16 tires. You'll need to get 215/45-16 tires instead.

Or, you could get 16x7 rims which you could use with either of these tire sizes.