Thanks, went with a 31 x 10.5 at ta. Fits fine sitting on top of a piece of 2x8 to raise it a tad, retainig bolt through one of the mounting bolt holes. Currently runnig 32 x 11.5 hankook mt dynapos and figure just air the 32" on the other side down a tad if I need to run the spare. No lockers yet so shouldn't be a problem. Seems like being able to run a different sized spare would be another benefit for using air or e-lockers.