[mully]

Thanks for the replies! I found the specs for my oem tires that are still on the truck...Goodyear Wrangler ST

245/75R16
Load Index 109 = 2271lbs (1030kg) per tire
Speed Rating “S” = 112mph (180kph) 109S SL Treadwear: 340
Traction: B
Temperature: B340 B B
2271 lbs. max load
44 psi tire pressure
12/32" tread depth
33 lbs. tire weight

9.8" section width

30.5" dia
674 revolution per mile
Country of Origin "CA" = CANADA


And the specs for the narrower but same diameter E-rated Goodyear Wranger HT for comparison.

215/85R16
E
2680 lbs. max load
80 psi tire pressure
13/32" tread depth
40 lbs. tire weight

8.5" section width

30.4" diameter
677 revolutions per mile
Country of Origin "US" = UNITED STATES


I'm still confused on the couple of replies that don't reccomend this change in tire size as they are roughly the same diameter and have a heavier load rating. They are narrower, putting about 4.5" less rubber on the road. Wouldn't that mean more mpg's? They are heavier though weighing 7lbs more per tire. Still learning here and love this web site!
mully