hey guys! i recently turbod my 99 si and am having major traction problems. i am looking at bigger tires and am curious as to how big i can go on my wheels? i currently have 16x7's and running 205/40 right now. just how big can i go diameter wise? think i could possibly fit some 235's on or so? thanks!

 

that was a dumb question to ask i guess? really guys, any answer would be great.