I would go 285/70-17, for a number of reasons. This is my wheel/tire setup, I just installed it a couple days ago. But their size (wheel wise) is very close to what you have chosen.
Mine are 17x8.5 -6 offset, so yours would be 1/4" wider on each side compared with mine. You would likely find a 17x9" to be too wide for a 265/70-17. My 17x8.5 fits very nicely with the 285 profile. My father runs a 265/70-17 Falken Wildpeak A/T3W with a Fuel 17x9 wheel (on his Colorado), and in general I think the wheel is too wide for the tire. It still looks OK, but the tire definitely is pulled wide because of the wheel.
Funny fact: my FJ (which came with stock wheels and 265/70-17 tires) ran a little slow compared with its actual GPS-indicated speed. I would be doing an indicated ~72 or so but my GPS was at 70, and so on. When I installed the 285's, I tested this again and now its dead-nuts right. So I'm almost left to wonder if the FJ was originally designed with 285/70-17's (or 285/75-16's) in mind.
You might have to remove the mud flap, but you probably won't have to do a BMC. I have a Toytec Boss lift and JBA control arms which improves caster, but I don't know if that makes much of a difference in the wheel placement vs. the body mount. Most people running 285/70-17's seem to not have a problem. I would say do 285's for sure, plus the truck looks amazing with them.
Edit: Probably should also point out... do 5 not 4.
Update on my fitment question. So I went ahead and ordered the 17x9 with a -6 offset and had my tires mounted this morning. Have to say that I am very pleased with the way it looks and rides. I think the tires look beefy without compromising mpg. No rubbing anywhere. Happy with my purchase.
SCS 17.5 Wheels
is it safe to put this on rear door. It doesnt fit, but was told one option is to rotate 180 stock carrier or purchase spacer. Again, looking for safe option to keep tire at rear. Have had different opinions.
bumper upgrade is not an option. Please advise.
Ok so I have been in the market for some 16" wheels and have done some research on this forum. The question of will this wheel fit comes up a lot and seeing as some others have tried and failed with similar threads I figured I would give it a go. So post up rims that you PERSONALLY have...
been doing research on my 1st upgrade to my stock 2007 4WD 6 speed MT, 17" Alloy Wheels with Mastercraft HSX Tour tires (265/70R/17 that I drove 150 miles to my lease on interstate and state roads. Then 10 miles on logging roads to reach my hunting lease. the logging roads went from...