I am wondering how big of a tire I can get without destroying my milage. I am running 245/75's right now all of them time. But I am wanting to get another set for pavement driving. I figured I could just go back to stock size but wanted some other options. any ideas?

_________________
OH NO! I THINK WE NEED SOME "OH SH*&T HANDLES!!!!
KJ gone.
New ride
05 Rubicon Unlimited, mostly stock.Starting to add stuff.

I have a CRD and 245/70s didn't seem to change the mileage or speedo. The rack and light bar will also not help you any. Even the stock sized BFG ATs seem to decrease mpg some.

_________________
No one knows as much as all of us.

235/75/16's are a good choice... ~29.8"

http://www.herculestire.com/catalogHerculesLTruck.htm

Terra Trac AT

_________________
Founder of L.O.S.T.
2006 CRD Sport
Mods: GDE Hot Tune w/ 364#@2000rpm/Air Box /3" Str8 Exhaust/ASFIR Alum Skids/245-75R-16 Cooper STT PRO/OME LIFT w/Clevis & 4 Spring Isos/AirTabs/Rigid 10" S2 LED/4xGuard Ctr Matrix Bumper
Drag Strip:Reac=.1078_60ft=2.224_1/8=10.39@64.8mph_1/4+16.46@80.8mph

well the light bar and the rack are off for right now those only go on when I am going on an excursion somewhere. I was thinking on some 235/75's or 240/70's. I may look into those if they don't affect the milage much. any other ideas?

_________________
OH NO! I THINK WE NEED SOME "OH SH*&T HANDLES!!!!
KJ gone.
New ride
05 Rubicon Unlimited, mostly stock.Starting to add stuff.

Here: http://www.net-comber.com/tirecalc.html

Yes, taller & narrower tires give you better gas mialage.

depends on rolling resistance