Not as long as you stick with what Geezer said for the tire; 195/60-15. It's a stock size for the Focus's that came with a 15" wheel, so all will be well. I believe 16" steel's do exist for the focus but they are rare (think some Canadians have them.) You can also keep an eye out for a used set of 15 or 16" Focus wheels as well, might find a set for similar prices as the steeleThanks for the replies. If I choose to go with the 15" wheels and tires, will that affect my speedometer at all?