Roof rack doesn't sound good to me. I have 31X10.5-15 tires on my K10. No way I could get something that heavy up and on to a roof rack. Mine is mounted inside. I have considered having something built for the front, so the spare could be mounted there. Another possibility is mounting the spare on the rear door, outside. Mounted on the door, so that when you open the door, the tire goes with it. You'd probably have to reinforce the door, and the hinges or where they are mounted might not support the weight. I have a '72 Landcruiser with a swing away rack. NOT a good idea. To access back-release latch on rack, swing out rack, open door, close door, swing rack back in, close latch. If you do that a half dozen times a day for 11 years, it gets old.
