I have friends that have 2 blazers and have 31" tires on them. They had the spares on the rack on the back, but the tires weight ripped the mounts of the rack out of the body off roading on both blazers, so I would sugguest finding another way to mount the tire.
1974 Dodge W100 Power Wagon
Looks beaten up but it's fun.
360 V8, TF-727, NP-205, D44 front, chrysler 8 3/4" rear with detroit locker http://members.shaw.ca/jaretthumphrey
[This message has been edited by Jarett (edited January 09, 2002).]
Well besides the roof (which I don't like) I think yer only other option is a custom bumper with some kind of swing away tire carrier built on it. That was my only way of keeping it outside the truck. 35/15.5/15 eats up a lot of room inside a truck. And doesnt fit well on a stock bronco 11 tire rack.