[scaryjello]

I will be replacing tires next spring and I already know that I will be purchasing Michelins PS4S tires. However, I want to run a 26" drag radial (separate wheels) just for the track and my understanding is that with a 245/40r20 up front (27.7") I will run into some computer issues, mainly ABS, stabilitrak, etc.

Option 1:
I was thinking of going with a 245/35 up front and leaving the rear stock size, but I fear that may also lead to some computer issues (0.8" difference) as well as how it will look.

Option 2:
245/35 up front and 285/30 in the rear creates an almost identical setup in terms of diameter, but will obviously change transmission and gear ratios. Not sure how badly, if at all, that will affect performance as it will clearly go through the gears a little quicker. I know the 26" DR will do the same thing, but more worried about the racetrack.

What do you guys think? I plan to run these tires as my daily/weekend warrior and also on a racetrack (1st timer!). I know another option would be to run stock sizes all around and have a 28" DR or slick in the rear for the drag, but I've heard bad things about that with the M6. Thanks in advance!