I hear 295 75 R16 is the biggest you can go and still be able to mount the spare between the frame rails. Well, I like the 315's (already have the 2" leveling kit in a box) and am wondering where to keep the spare. Or, should I just get 4-315's and keep the 265 underneath. Then if I have a flat on the back w/ the LSD move a front tire back there and place the odd sized 265 on the front?