I am planning to get new wheels for my Evo X GSR and use my 18x8.5 stocks for snow tires.

When talking to vendors, they seem to say that 18x9 is the " standard" wheel size for Evo X's and that most manufactures dont even make an 18x8.5.

I would like to continue to run in stock class for autocross.
my question is whether moving from an 18x8.5 to 18x9 is likely to disqualify me from running as stock. Do officials care about the .5 inch difference?

thanks
ian

 

Yes...

 

If you run at local clubs and its fine with your fellow competitors then there won't be a problem. But once things get competitive either locally, or regionally then you'll have to make sure you're legal. If a fellow competitor thinks that half an inch gave you the advantage to beat him/her, then he/she has the right to call you out.

If you run street rubber, then you'll be more competitive running in STU (or equivalent class) rather than in a stock class that allows R-comps, and you'll be legal using an 18x9" wheel.

 

thanks Loser. at least at the club i was planning on running in, there are seperate classes for stock with street tires and stock with r-comps
Ian

 

Your region separates stock into street and r-comp? I've never heard of that. Sounds like a nice thing for new peeps just getting a taste for solo ... that and some cars don't do so well with all that grip, aka my spec-v that i almost flipped in ohio

 

Is that a New Hampshire based club? I've heard of clubs doing that, mostly to keep the stock guys without the budget for r-comps interested. Honestly the club won't care unless another competitor wants to object to it, so as long as you become good buddies with your competitors then it's fine

 

some regions (Texas) have a "Tire" class which is a street tire PAX class for those that don't want to run r-comps.

OP, get 18x9.5's with 245 max width tires and run in STU. You can do basic bolt ons and actually enjoy your car. The X is simply not competitive in AS.

The 245 max is an STU rule btw.