Wheel Offset and Tire Sizes
 

Ok, I'm sure this has been asked before somewhere in this forum, but I'm thinking of going 20 inchers for my X3. What kind of offset and tire sizes should I be looking at? I know the stock is 46, however, I'm looking into some wheels which have a 40 offset and also I'm looking into staggering front 8.5 and rear 10. Does anyone know the optimal tire sizes if I go for this setup?

I've never been able to figure that out. Have you tried Tire Rack? They have some good articles like this one that help you decide what fits where... Hope this helps.

Juan