Start here.... then go here. For me, it's all about terrain, I live in the Piedmont region of central Virginia, rolling hills with a mountain pass at 2100ft, lot's of overdrive type long distance driving. Think about how you will use your truck and decide on your ratios and tire size, play with that second site, get in tune with the sweet spot of your drivetrain.

Good luck,

Cosmo


~ Cosmo
1949 Chevy Half Ton
Rocinante, like Don Quixote, he is awkward, past his prime, and engaged in a task beyond his capacities.
"...my good horse Rocinante, mine eternal and inseparable companion in all my journeys and courses." ...Don Quixote, Cervantes
"If you come to a fork in the road, take it."...Yogi Berra
"Rudeness is the weak man's imitation of strength." ...Eric Hoffer