Originally Posted by JAFO
I read through a great portion of this thread. Interestingly there was no specific answer supplied making it clear on the backspace that is the proper dimension when running the 285 tires. If I missed it I apologize but seemed like a lot of debate then the people asking "if this will work" post. Clearly there has to be an optimum backspace required to allow the larger tire to fit with no mods or minimal trimming.
While I agree it is so hard to tally up all the factory dimensions of the optional wheels offered by Toyota but why worry about it quite honestly being you will change them.
As I have been searching for wheels I like, it is a chore to get the information from the manufacturer about the backspacing.
With that said, does anyone have the magic numbers for a 7" to 8" wide wheel? Is it 4.5" BS that will allow the proper clearance of the UCA while not sticking out much past the fender line?
At the moment, I have a 18x9 wheel with 0 offset (so should have a 5" backspacing). The tire is 305/60-18. I also have a 3" lift with LR UCAs. I have about 1/2" between the tire and UCA, and my tire sticks out no more than 1/2" from the flare.
I should be swapping to a 16x8 with 0 offset soon, and a 285/75-16 tire (very common for us around here). That should put my tire flush with the fender flare.