To esc,
It all depends onhow much are those 16s, 17s, or 18s wiegh. Remember, the lighter, the better! If you can find a rim that is bigger than your 16" rim with the equivalent weight, it would be perfect. This is because, you can have a bigger and wider tires to go with. That means, you'll have more grip. Normally, the bigger rim weogh more than the smaller rim. Unless you want one of those Volks, HRE, or Kinesis rim. These rims are so light compare to the size of them. Of course, they are expensive, too.
Hope this help a little.
BlackCow
