For a SRW truck.
31" x 0.12 = 3.72 (stock is 3.73)
33" x 0.12 = 3.96 not really worth the change to 4.10's...
35" x 0.12 = 4.20 so try 4.10
37" x 0.12 = 4.44 so 4.30's
38" x 0.12 = 4.56 so use 4.56
40" x 0.12 = 4.80 so use 4.88
44" x 0.12 = 5.28 so use 5.13
Take the tire size you desire and multiply it by .12 and then pick the closest gear set available.
Last edited by Marty : 12-26-2007 at 12:15 PM.