Finishing up my restoration on the 85 4x4 XtraCab pickup, it has no lift with original suspension. This truck will be my daily driver and not a rock crawler. (Pictures coming).
I want to use a set of 17" FJ wheels I have and keep it as close to factory setup as possible.
I understand the issues I will have with backspacing and I will be using spacers.
I am looking at Kenda Kevlar A/T in 235/65r17 spec'd at 29.1" tall. Knowing that it came with 225/75/r15 at 28.3" tall.

Most of my driving will be road and I will always have a set of 31" tires I can put on if I wish.
I have not seen this combination before.

I have another option to use a 15x8 aftermarket alloys with 235/75r15 but the FJ wheels are much nicer.

Will I have enough sidewall with the 17"? Just looking for some feedback and comments...

 

i think that there are fj steel wheels, and then fj aluminum wheels? both are pretty cool.

15" tires are going to be cheaper, but if you are looking at owning the truck for a long time, 17" tires will give you a whole lot more choices, it's the most popular wheel size on the road.

i would be more inclined to worry about tire width and height than sidewall.

oh yeah, almost forgot... if you go the fj route, you are going from factory lug-centric wheels to factory hub-centric wheels, so be sure and understand the differences.

 

Thank for your insight. I very much agree about the 17" wheels for tire selection.
I believe I will be using them. My concerns about size of tire I'm using are much less now that I'm noticing jeeps and trucks with factory 17" wheels.

Even though the 235/65r17 is very small 17" tire for a truck it is still taller and wider than the OE tire.

A good point to bring up hub centric vs lug centric.
Here is a link...hub centric vs lug centric

These are the same style wheels I have..

 

that wheel will look good on the truck!

i ended up getting really complicated with it, in that i wanted to run 37's, and those fj's were just a bit narrow.

i found some new rotary-forged beadlocks for $140 each, but they were trophy truck 6x6.5... so i had a company up by lake tahoe make up spacers that went from 6x5.5 to 6x6.5... not cheap! :-0

your situation would be similar, except that you might be able to find 6x5.5 hub-centric spacers somewhere in stock already, but it'll probably take some digging.

those work great on the rear axle, but the 4x4 front is another problem... i had four of the hub-centric spacers made, but had to machine off the hub ridges for the front, because they were too thick to fit between the wheel bore and the axle hub :-/

it all worked out great for me, because the wheels i got have the 45 degree chamfer cut for lug-centric lug nuts... the shop tried hard to sell me on running both hub-centric and lug-centric at the same time, and it actually worked out great... zero vibration, and when you are hurking a 130lb wheel/tire onto the rear axle, that hub-centric ring gives you a place to put the tire, similar to how it works on the front axle hub.

those fj wheels won't have the chamfer cut, so you'll have to come up with a custom spacer or something for the front hub area... you can order plastic hub spacers from discount tire, but they might be too thick for the front axle hub.

some people just ignore this situation and run 'em, but...

one other thing... the custom spacers i got are minimum 1.25", you may not be able to get 'em any thinner than that, fwiw

 

I went with a 245/70r 17 tire...