Originally Posted by scottydsntknow
Generally if you stay under a 1" difference you'll be fine. My current setup is about 1/2" smaller up front than the rear and I have no issues with ABS. Not sure about the newer traction control stuff but rule of thumb is to keep them within an inch of each other or delete ABS.
I have slightly different overall diameters due to the staggered setup. Advanctrac / abs freaks out ("service advantrac") on wheel lock continuous turning (usually pulling in or out of parking spots).
255/35r20 (770 revs per mile)
285/30r20 (777 revs per mile)
The only other issue I think is dirty sensor or short related. During extreme cold rain (near freezing), I get the same "service advantrac" message just driving straight.
Outside of those conditions, no issues...
2011 Black Mustang GT Premium
Corsa XO & Sport AB/Airaid/Bama 93R
Best 1/4 mile to date 60' 2.009
12.538 ET @112.33
100+ Deg 85 Hum RPR 3PM 1/2 tank street tires