OK, I know this has been beaten to death, but if I went with 18x11 R and 18x9 F what offest and tire size would I need. I'm looking for the widest I can go without rolling my fenders, with no rubbing. Even if I were to drop my car a little bit. Can anybody help me??

 

depends on the offset but...

275's front
315's rear

... are a good combo

 

^ can you go wider for the rims? like 10" Front and 12" or 13" Rear

 

12s are max and youll need a lil bit of work....................maybe a 13 if you go Wide body

 

Use one of the offset calculators above and compare the new wheels to your current ones. Then check the car with a tape to see if you will have any clearance problems.

 

what offset calculators??

 

Now 11" is certainly doable wit the right offsets

For an 11" in the rear you're looking at about a +25-28 offset with no rubbing issues. Even with 295-305 tires. Some fender rolling would be smart thing to do.