Why are you worried about stock wheels? The rules are written to allow any wheel, and this whole discussion arose because you don't want to change that. So given that wheels are free, and even fender rolling is free, the limitation becomes space under the stock fender and ability to clear the suspension -- go too wide, and you may not be able to steer much. Some cars can't, some cars can, and for some of those that can, there's an advantage...so what? The same is true of any other allowable mod in Stock.Loren wrote:Allowing a car that comes with 185 or 195 to go up 30 mm is pretty nuts. Some cars will be able to do it, and others won't... and THAT is the problem. Setting a reasonable limit that most cars CAN achieve, and reasonably could achieve with their stock wheels... that's what I'm hoping to achieve.
You see a specific emerging or potential threat the rest of us don't...what is it? The Miata example doesn't hold water -- NB Miatas had 205s as an option, and later as standard, so this rule wouldn't prevent an NA owner from stuffing 225s under his car. 235s are self-defeating -- they wouldn't fit well without prohibited modifications. If that same NA owner is trying to stay within SCCA Street rules, then they might be running a 205, but having run both 205s and 225s on my Miata, the difference is well within the driver talent range we see. What other examples do you envision?