I just threw on a set of used BFG a/t 285's on my stock wheels that i got for only 35/tire. How many miles to the gallon will i lose? will i notice a tremendous drop. just asking since i had P265's before and these tires are alot heavier, and also hold more air. Thanks

They sure do make the truck look more aggressive!

 

im thinking somewhere between 1 and 1.5mpg difference from stock...some people say they see as much as 3 mpg different but i didnt and i am by no means a gas friendly driver...ive seen about a 2mpg drop running 33x12.50x17 MTs over the stock setup on mine

 

In town start and stop driving you will lose 1 to 2 mpg, highway driving maybe 1 mpg. Worth it for the "look's"!!

 

from 265 to 285 not much at all.

 

oh its def. worht it to me, my truck looks so much better now! even though mine are about half gone still look great. just couldnt pass up the offer for these

 

Man that is a great deal on the tires

 

I went from the stock 275/55/20 to a 305/55/20 and have not lost any mpg what so ever. I check my mpg at every fill up I get the same as day 1.

 

OK, I had a question about this and I ended up having to get tires a couple of weeks earlier than planned...I had two tires go down on me in two weeks, but I can't complain since they were OEM BFG's that have 81k and 83k on them.

I have had great experience with Goodyears and installed 265/70R18's versus the BFG 265/60R18's installed originally. The GY's are a little taller (about 2 inches) and heavier (about 4lbs each), but I've gone from 18-22mpg on the highway to getting 15mpg this evening. A 3mpg+ drop is terrible, and it can't be just the tires being taller or heavier. It felt like the truck was working harder, and it was running at 2000rpm at 70mph versus 1800 normally.

I know with aftermarket tuners after you change the PCM it takes a few days for it to acclimate to your driving habits and the new settings...would changing the tire size cause the PCM to be temporarily out of whack? Will it correct itself in a few days? I assumed that a slightly taller tire would help gas mileage if anything. But this is so bad that I'm considering going back tomorrow and swapping out back to the BFG tires again.

Any helpful insight on this?

 

your tire size did change right? that would cause your speedometer to be off causing your mpg's to drop more than actuallity. once your speedometer is right then calculate your mpg.