gaijin
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- #61
Thanks for the quick and thorough reply Gaijin!
Like you said, Ill probably just go with the rubber now, then see how much clearance I have in the garage before I do the lift.
Since the 285/65/18 is the same diameter as the 285/70/17, I guess it comes down to whether or not the appearance and ride quality with the taller sidewalls is worth investing it he 17" wheels. I assume you thought it was - anything that you think I should consider (aside from how good they look)?
Also - anyone know if the 32.7/ 32.8 BFG fits in the spare well underneath? I agree that the OEM would be fine for a spare, but would probably buy a matching spare if it fits.
You're very welcome - always happy to be able to help out

I bought the 17" TRD wheels and tires because I wanted two sets of wheels/tires - the stock wheels and tires for long road trips and the TRD/BFG combo for off-road and winter/snow driving.
If all you want is one set of wheels/tires for use under all circumstances, then I would put the BFG AT T/A's on your 18" wheels. This combo will work well on and off road.
The subject of whether a 285/70-17 or 285/65-18 full size spare will fit under the truck is an interesting one.
I recently purchased a 5th TRD/BFG tire/wheel set to use as a spare when off-roading. It was never my intention to mount it under the truck because, frankly, that is the last location I want to have to go to for a spare when I am off-road - it is a very inconvenient location. I intend to simply throw it in the back cargo area and strap it down when going off-road. This has the advantage of maintaining the stock spare tire should I ever need 2 spare tires.
But then I thought, why leave the full size TRD/BFG spare in the garage when I have the other 4 mounted? Why not just throw it under the truck in the stock spare tire location and then I will have a full size spare available should I need it when I am not off-road?
I took down the stock spare, measured the spare location and determined that the TRD/BFG should fit with no problem.

The problem came when I put my TRD wheel/tire combo under the truck in preparation for winching it up into position - the gizmo on the end of the chain that holds the spare tire in place DOES NOT FIT INTO THE OPENING IN THE TRD WHEEL!
So the TRD/BFG combo would most probably fit in the stock spare location if one could find a way around the attachment hardware at the end of the spare tire lifting chain.
So, my guess is that if you mount the 285/65-18 tires on all 5 of your stock wheels, the spare will most probably fit in the spare tire location under the truck and yopu can use all 5 tires when you rotate them.
Another option would be to purchase 4 TRD/BFG wheels/tires with the 285/70-17 tires and mount a 285/65-18 tire on your spare. This would, however, limit you to a 4 tire rotation scheme.
My best recommendation, however, is to leave the stock spare tire alone and mount the 285/65-18 tires on 4 of your stock wheels. Nothing wrong with a 4 tire rotation, and I have no problem using a stock size tire as an emergency spare.
HTH