Looking at Toyo MT 285/75/18 on 18x9" Alba 688 Crossroads with +30mm offset.

The tire is 35.1 tall, 11.5 wide.

The rim has 17mm less backspacing than stock fims but is 1" wider - meaning the tire will be 4-5mm further OUT from the control arm than with a stock wheel.

My stock 265/70/17 are measured at 31.2" and at full lock with stock wheels it looks like there's a couple of inches to spare (in radius), but it will be close.

+30mm offset keeps the tires inside the fenderwells. I don't want to install flares. The truck is signature and has 2.5" level kit on front, stock rear.

 

what is the b/s? that will be in inches, not mm's.

 

I ran a 35" tire on my truck for a short time on a 8.5 inch wide wheel and they did not rub with only a leveling kit. as for the backspacing and all that I cant comment on that. with a 9" wide wheel you may get a little rub if you turn all the way or get into a bad bind off road good luck

 

offset is not backspacing. you need to find out the backspacing.

I run those tires on 18X8.5 w/ 5" backspacing and no leveling kit and they rub the back of the inner fender slightly at full lock and at less than full lock of you are flexing the suspension at all at the same time. So they better have at least 5" backspacing w/ your leveling kit being 9" wide.

 

A 9" wide wheel with a +30mm offset, should be somewhere close to 6.2" backspacing. I think it'll work great.

Check out this link...

http://www.1000rims.com/rt_specs.jsp

--Eric

 

If the wheel is 9" wide, zero offset would be 4.5" backspacing.

+30mm offset is 1.18" of additional backspacing. Therefore these wheels would have 5.68" of backspacing.

The factory wheels are 8" with 43mm offset, so they also have 5.69" backspacing.