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-   -   Affects of large tire (https://forums.off-road.com/jeep-short-wheelbase/136596-affects-large-tire.html)

**DONOTDELETE** 09-19-2002 08:42 PM

Affects of large tire
 
I just bought a new TJ, its only the 2.5 liter 4 banger and I have some questions. I want to do a 3" lift and 33" tires, What will be the affects of these tires on my gas mileage and will I even be able to keep up with traffic? It is my only vehicle so I need it for on and off road use (I will however be getting MT's) If these tires are to large for economical perposes I will get 31"s or 32"s, I'f I decide to go with smaller than 33" what height lift should I get??? I would appreciate any help.
thanks
Patrick

**DONOTDELETE** 09-19-2002 08:45 PM

Re: Affects of large tire
 
As long as you regear you wont have any problems

**DONOTDELETE** 09-19-2002 08:50 PM

Re: Affects of large tire
 
what gearing should I use for 33"s (just to get the power back to stock or better)

Olin18 09-20-2002 06:35 AM

Re: Affects of large tire
 
I would go with 4.56's in your axels. They are still relativily strong, and you get a little bit of extra grunt. I run 33X12.5 Tsl's with the 2.5L I still have the stock 4.1 R&P and as long as I don't use 5th gear I don't really have any complants. A Jeep is not a race car. I love to play in the mud, and I do miss the power there.

krazykracker 09-20-2002 02:01 PM

Re: Affects of large tire
 
I'm running pretty much the same set up 33" TSL's,2.5L I went to a 4.88 R&P just to get 5th gear back. I figured if i'm turning 2800rpm's I may as well be going faster.

jamgood96 09-20-2002 02:06 PM

Re: Affects of large tire
 
Well atleast your stock gears ar 4:10's, so you're a little better off than some others with high [censored] gears. My YJ had 3.07's stock!!

Jeeplvr 09-20-2002 07:39 PM

Re: Affects of large tire
 
You can use my gear ratio calculator to figure exactly what gear ratio you will need to get your power back. All you need to know is your old and new tire radius.

<a target="_blank" href=http://www.trailhed.com/calculator.html>Calculators</a>

**DONOTDELETE** 09-20-2002 11:24 PM

Re: Affects of large tire
 
Well I also drive a 2.5 but I have 31's on it, yes I can notice a little reduction in speed but its not enough to bug me, anyway I might get a 77 CJ5 2marow anyway.

mobdawg 09-20-2002 11:27 PM

Re: Affects of large tire
 
Funny post because if you worry about gas mileage the Jeep should be the last vehicle on your list...

knifeboy2 09-21-2002 12:52 AM

Re: Affects of large tire
 
I had this same concern about a week after I bought my CJ and realized that the gas milage sucked. But then through some counseling on this board and some self help, I realized that gas milage isn't that big of a deal. The fact that I have the baddest and meanest lookin CJ around makes it all worth while, and I love that scared look in peoples mirrors when I'm behind them.


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