Another tire size/MPG question - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > TJ Wrangler Technical Forum > Another tire size/MPG question

Cess Recovery Gear Snatch Tow Strap OffRoad @ ROCKRIDGE4WDGEARSHADE Pocket Tops in stock and available at ROCKRIDGE Engo winches available at www.rockridge4wd.com! Free shipp

Reply
Unread 01-06-2011, 07:30 PM   #1
05WK98TJ
Registered User
1998 TJ Wrangler 
 
Join Date: Apr 2010
Location: Clarkston, MI
Posts: 219
Another tire size/MPG question

Right now I have 31x10.5 Hercules MT and I am looking at either 31" or 33x10.5" BFG AT. I have a 4.0L 5 speed and 3.73 gears and I am wondering if I will gain/lose MPG with the 31" or 33" AT. And how much would it be?

And what if I ran a 33x12.5 AT what would the MPG difference be?

Thanks

05WK98TJ is offline   Reply With Quote
Unread 01-06-2011, 07:39 PM   #2
R U STUCK
Registered User
2004 TJ Wrangler 
 
Join Date: Jan 2008
Location: , Middle of Pa.
Posts: 2,929
As long as you keep the 3.73's. The 33's. You will be looking about a 2 mpg drop city. And about the same on the highway.
__________________
2004 TJ Rocky Mountain, 4" Fabtech, Engine Mods, Sitting on 35"s
R U STUCK is offline   Reply With Quote
Unread 01-06-2011, 07:52 PM   #3
05WK98TJ
Registered User
1998 TJ Wrangler 
 
Join Date: Apr 2010
Location: Clarkston, MI
Posts: 219
I assume if I went with 32x11.5 AT's the difference would be 1 mpg. Is there any difference between AT and MT tires affecting MPG's?
05WK98TJ is offline   Reply With Quote
Unread 01-06-2011, 08:10 PM   #4
AFjeepMan
Registered User
2005 TJ Wrangler 
 
Join Date: May 2009
Location: Vermont
Posts: 1,137
at's do have a minor benefit when it comes to mileage, but it's slim when looking at the same size...maybe .5 mpgs to 1mpg max
__________________
2005 Wrangler TJ, 3 1/4" RC lift, Cragar Soft 8's 32" BFG Mud Terrains, Smittybilt SRC D-Ring bumpers, Smittybilt XRC8 winch, Body Armor Rockcrawler side guards
[URL="http://www.jeepforum.com/forum/f22/my-05-tj-build-916271/"][SIZE="3"][COLOR="Red"]My Build Thread[/COLOR][/SIZE][/URL]

[COLOR="Red"][_l_[COLOR="black"],[/COLOR][____][COLOR="Black"],[/COLOR]
l----L - [COLOR="Black"]O[/COLOR]lllllll[COLOR="Black"]O[/COLOR]-[/COLOR]
(o)_) (o)_)--)_)

[COLOR="Green"]Wife≥Jeep>GF

Relearn your priorities.[/COLOR]

WANTED: SYE and cv shaft...good condition and good price. for a TJ with about 5-6" of lift.
AFjeepMan is offline   Reply With Quote
Unread 01-06-2011, 08:17 PM   #5
05WK98TJ
Registered User
1998 TJ Wrangler 
 
Join Date: Apr 2010
Location: Clarkston, MI
Posts: 219
ok well I would be more worried about the noise from the MT's. I will be driving about 300 miles round trip on weekends(half of them) in the fall when I go to college. So everything helps. Looks like 33x10.5 will be the way to go.
05WK98TJ is offline   Reply With Quote
Unread 01-07-2011, 09:07 AM   #6
R U STUCK
Registered User
2004 TJ Wrangler 
 
Join Date: Jan 2008
Location: , Middle of Pa.
Posts: 2,929
Quote:
Originally Posted by 05WK98TJ View Post
ok well I would be more worried about the noise from the MT's. I will be driving about 300 miles round trip on weekends(half of them) in the fall when I go to college. So everything helps. Looks like 33x10.5 will be the way to go.
If it seems that the 3.73's are not pushing your tires good enough for you. Look into going to a re-gear of 4.10's. On hills or going up small grades you may notice where you made it in 5th gear. You maybe shifting down to 4th to keep your speed up. But it isn't a big deal.
__________________
2004 TJ Rocky Mountain, 4" Fabtech, Engine Mods, Sitting on 35"s
R U STUCK is offline   Reply With Quote
Unread 01-07-2011, 09:32 AM   #7
atgreene
Registered User
2001 TJ Wrangler 
 
Join Date: May 2010
Location: 65721
Posts: 28
i have 33's MTRs with 3.73 gears and i get 14 MPG
__________________
|______
|l ,[____],
l---L –OlllllllO-
()_)-()_)--o-)_)
atgreene is offline   Reply With Quote
Unread 01-07-2011, 09:41 AM   #8
JeffBowser
Registered User
1997 TJ Wrangler 
 
Join Date: Oct 2010
Location: SE Florida, Florida
Posts: 1,492
If you are concerned with noise and do a lot of hwy commuting, MTs are not the way to go. The better ones will start out OK, but with wear will get noisier. If you are just looking for a good looking tire, with decent on and off road performance, have a gander at the Duratracs.

Quote:
Originally Posted by 05WK98TJ View Post
ok well I would be more worried about the noise from the MT's. I will be driving about 300 miles round trip on weekends(half of them) in the fall when I go to college. So everything helps. Looks like 33x10.5 will be the way to go.
JeffBowser is offline   Reply With Quote
Reply

Tags
33 , mpg , tire
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.