Tires.....Again

[mbeach]

265/75R16 MTs.

My speedo says 55mph, my GPS says 63mph.

I get 14.5mpg consistently, with city/highway and offroad (hills and gravel) driving.

[nfpgasmask]

Wow, that is *quite* a difference. So you are actually going faster than you think. Thats scary. Is there any way to correct this? Or is it just something you live with once you have bigger tires?

And how come I have never heard of this with other vehicles??? Just curious.

Thanks - Bart

[Ldub]

Wow, that is *quite* a difference. So you are actually going faster than you think. Thats scary. Is there any way to correct this? Or is it just something you live with once you have bigger tires?

And how come I have never heard of this with other vehicles??? Just curious.

Thanks - Bart

Check out the tire calculator at 1010Tire.com in the "tech" section of the home page.
It allows you to compare up to four sizes at a time to stock. Also gives the speedo error in percentage.

[ZEUS]

265/75R16 MTs.


I get 14.5mpg consistently, with city/highway and offroad (hills and gravel) driving.

Is that figured after compensating for the difference in tire diameter that threw off your speedometer (odometer) in the first place? I can't figure out how much a difference is made by my 31.5's with no lift on a tank of gas. If you figured out a formula hook a brother up!

[mbeach]

No, I didn't do the math -I just used straight numbers. I realize that I travel further with every rotation, I figured that it would be confusing to figure that in.

I have a decent tire size calculator -maybe I'll do the numbers tonight.