[hat_man]

Thanks everyone.

aardvarcus....the original tire size from the door is a 225/70/14. I have had several different brands over the years so an accurate number may not be possible. The 764 revs/mile shouldn't be off more than 1-2% I would think. The new tires are Firestone Destination A/T's in a 215/75/15.

The only ones in my old size that I could find on Tire Rack are the BFG Radial T/A's with a overall diameter of 26.5" and 786 Rev/mile. The new ones have an overall diameter of 27.7" and 753 Rev/mile.

It looks like if I can hit 285 miles on 10 gallons then I'm at least in the ballpark. Any thoughts on the trade off in weight and final drive? The new tires are 28 lbs apiece and the BFG's are 25 lbs. I have a feeling the new rims are a bit heavier also but I forgot to weigh them before the new tires were mounted.