Originally posted by Bagheera
Hi Y33TREKker,

When I ordered the rims, they told me they had a +10 wheel and a + 20 offset there as well......I was having a huge dilema over what to do, but I told them that I wanted the tire/wheel to stick out about 1.5" so they said go with +10 for the offset....I am not too if the +20 would sit too much farther in.....I'll let someone else with 20" rims chime in on that one.....
I guess I was just curious how close that particular offset, wheel size, and tire size brought the tire to such things as the struts, and the inner fender wells and frame when turning lock-to-lock. Before I bought the wheels and tires for my car (after lowering it), I checked to see how close the stock wheel/tire combo came to the strut spring perches so I'd know about how much room I had to work with. I then started experimenting with rim/tire size calculators like the one on www.1010tires.com to find out what rim and tire widths (with the appropriate offsets) I could use to keep everything as far into the wheel wells as I could without rubbing against anything during normal use.

http://www.1010tires.com/TireSizeCalculator.asp

The calculator will give you overall dimensions (in three-dimensional form) for making comparisons, which is especially useful when you're also considering changing rim and tire 'widths'. After Plus-Two sizing, this is what I came up with on the car:

http://mediaservice.photoisland.com/...7153366014.jpg

I'm about as close as I cared to get to the spring perches with my tires, and about as close to even with the fender lines without sticking out as I could get. That's for a car though, and obviously SUV's are somewhat different depending on whether you prefer a street, or an offroad look.

I think your set-up looks great, don't get me wrong, I'd just prefer to keep things inside the fender lines if at all possible. And If I could do that with 20's by just going with a higher offset, that would work for me. Specifically, I'm curious how close the top/inside of the tire on the new setup is to everything. Since 1.5" = 38.1mm though, merely going from a +10 to a +20 wouldn't achieve my goal. Keeping a set of 20's inside the fender wells may just mean having to go with a narrower setup.

Sorry for the novel. Using the tire size calculators is one thing, but real world measurements are even better.