Old thread... I know.
My back tires are 185 75 14. lol I'm lowered almost 2" so this gives me much needed ground clearance. Tall thin tires with lots of tread + LSD = I never get stuck. EVER.
I wanted to get these on the front but due to the shape of the inner fenders on the e30 there is a ledge where the trays are under the hood and the fronts were rubbing. I put 195 70 14's on the front.
Tight cornering is not recommended but I still did 20 over + all the way to Valdor Quebec last year with this setup and it works.
Passed a 4wd Audi going uphill in a snowstorm a few days ago. Maybe his car is better but he has way less balls than me that's for sure