I'm getting 16X7 saab aluminum wheels 5X110 for my SS/SC. Question is how wide can I fit in the well and on the rim. like 235/50/16? or 225 atleast? I'd like to know thank you I've never bought tires and not really interested in reminding myself what the second number is but what about p235/70r/16??

 

225/50/16 is as big as you want to go. A 235 will rub in the turns.

225=width of tire in MM
50=height of side wall in percent of width (so in this case, %50 of 225 is 113)
16=wheel radius