32's, 33's: 4.56 (If you live in the mountains, or your rig is on a trailer a lot, put your purse down and go to 4.88's)
35's: 4.88's (Only because you can't get 5.13's in a Dana 30. If you live in a state that has a SINGLE rock you may one day want to climb, ditch the 30 and step up to a 44 and 5.13's)