texasredrider

after looking at the picture above and going over my math my tire combo will be 1/2 inch plus 10mm in. My 315's look pretty close to Paulys so I am thinking it will be that much in.

jamesbfishin

A 20x9 wheel with 5.5" backspacing should be the same as a 17x9 with 5.5" backspacing. The overall diameter shouldn't have an effect as long as wheel width and backspacing are the same. Like Pauly said a different width will yield different results. A 20x10 with 5.5" will stick out 1" more than a 20x9 with with 5.5", and the offset would be different (more negative).


It can get confusing, I've been wheel shopping for 6 weeks

texasredrider

The 315's are a little over 12 in wide. the new tire is 13.5 inches wide. taking that into account, plus the offsets and back spacing of the wheel I want, I THINK, it will look the same as what I have now as far as how far the wheel sticks out......IF my math is right. Does anyone have a similar setup and a pic? it will be greatly appreciated!

Tacsavage

I ran Pro Comp 6005s in 17x9 with 4.75" backspacing with bfg 35 x 12.50 MT with a 2 inch leveling kit without any rub on fender or control arm, but it was close to the fender with the wheels turned.

texasredrider

How much did they stick out?

BLUEBURNER

Well now, I know everybody hates 4 Wheel Parts, but please keep in mind that not all 4wp salesman are the same. I work at 4 Wheel Parts here in Fort Worth, and I would have simply pulled your truck in the shop, taken the wheel off, and measured stock offset. After that was done, I would sit down with the customer and work through the math on the new wheels and tires to see how far they will stick in/out from the stock wheel and 315's. This is simple customer service without being a cocky salesman. I agree with ptgarcia, they will fit, however, you will get rubbing on the control arms during steer lock, or even before since a leveling kit slightly offsets the axle to the passenger side because there is no trac bar relocation in most kits. The extreme a/t comes in a 35x12.50r20 that will truly fit alot better, I find in most cases the 13.50 is alot wider than it seems in comparison to the 12.50. I think that those wheels and tires will look very good on your truck.