BFG TKO2(265/70/17) C load vs MPG

May i ask for your real world mpg drops after going to BFG TKO2 in a 265/70/17 C LOAD.
Bone stock double cab V6s tacos . I average 18/19 now day to day light foot . What kind of hit will I take . Thank you .

 

I know you didn't ask for my tire size or load range, but I'll throw it in there to give you a more extreme end of the spectrum. I'm running 285/70/17 KO2's in E's and I'm getting a solid 16.5 MPG with mostly city driving.

 

I did my 265/70R17 KO2s in C-load plus supercharger at the same time. I get 16-18mpg depending on how much time I sit parked on the highway. Also consider your speedo will by off by 3%, meaning your mpg will be 3% higher than what you calculate.

 

Thank you both for your response , all info welcome.
Hmm how do you do the figuring?
With the 3 % diff that's me and math.
Im hoping to stay at 18ish am I kidding myself (city)

 

Tire diameter:
265 = width in mm, 65 = sidewall height as a ratio to width (tires have sidewall above and below the wheel, so x2 to figure diameter), 17 = wheel diameter in inches
265/65/R17 = 265mm width x (0.65 x 2 sidewall) + 17" wheel
265mm * 1.3 sidewall +17" wheel
344.5mm sidewall + 17" wheel
1" = 25.4mm
344.5/25.4 = 13.56" + 17" wheel
30.56" diameter

Repeat for 265/70/R17
31.6" diameter

31.6"/30.56"=1.034
3.4% difference

Meaning you went 3.4% further than your odometer says. When you calculate your mpgs, multiple the final number by 1.034 to get the correct number, otherwise you are plugging in less miles based on your odometer which will cause your fuel economy to appear to be less. 3.4% will likely equate to about 0.5mpg. The last digit will be insignificant, so I would just use 1.03 like I mentioned above. So when you swap tires and calculate your mpg, and get 17mpg without correction, 17x1.03 = 17.5mpg corrected.

 

Holy crap! I'm so sorry I wasn't ?ing your claim of 3 % . Just how to figure mpg if I go that route. That's backing it up though. Thanks again!

 

No worries, you asked how I did the figuring so I showed all of it.

 

After my stock Bridgestone Dueler tires crapped out I upsized to 265 70r17 load C KO's. While I noticed an immediate improvement in handling overall, my MPG's took a noticeable hit and the vehicles on road rolling resistance increased. I couldn't give you exact figures, but it was a several mpg difference.

 

your a bad monkey hairy taco, lie to me. A few mpg ??!!!! I can't justify that
I love these emoji s
I really would rather go similar diameter but skinny in a C load , can't seem to find it .

 

ATKO'S are not light like the piddly little stockers. 255 75r17 exist.

There is a reason they put light little tires on the stock trucks. They can advertise good mpg's and save money. It's a truck, you want nice tires you gonna get punched in the wallet...

Remember " Smiles per Gallon>Miles per Gallon"

 

Good thread. Answered my questions re: immediate loss of mpg as soon as I threw on bfg ko2 in 265/70/17. I am noticing anywhere from 2-3 mpg drop. Is that normal?

 

I did 265/70r17 ko2, wheels and level and my fuel economy stayed right about the same. Had the old bfgs on before so I can't say it got any better. I'm averaging around 16 mpg.

 

That's what I am seeing as well