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Old 02-27-2006, 12:56 AM   #1
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Question Totally Stock, total newbie

Hi everybody,
I am looking at getting rid of the stock goodyear 225/75/15 tires on my totally stock 03 and am wondering what I can get away with for tire size upgrades.

What could I put on there without any suspension/lift upgrades?

What could I put on there with a small (1-2") lift kit?

Thanks in advance,
Rob
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Old 02-27-2006, 09:05 AM   #2
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Hi Rob,

With no lift you can fit 31"s pretty decently; and it's a perfect fit for a 1 or 2" lift. If you take a 2" budget boost and a 1" BL - you should also be able to manage fitting 33"s in there.

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Old 02-27-2006, 10:21 AM   #3
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While I agree with 31x10.50 fitting fine without a lift, 33" tires are really too big for a 2" budget boost and 1" body lift. I used to have new TJs lifted for some of the Jeep dealerships in San Diego and I experimented once with that combination but it just didn't give enough clearance to do it again.
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Old 02-27-2006, 10:40 AM   #4
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Exclamation Hang on!

Before, you go to a much taller tire...

Are you in a 6 Cyl or a 4 Banger?

Do you have an automatic transmission?

What rear end gear ratio do you have?

If you are a 3.07 RER and or have an Auto or a 4 Cyl you might be disappointed if you go over 29"!
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Old 02-27-2006, 08:03 PM   #5
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auto---

It is a 4.0 litre, 6 cylinder. However it is automatic...

My wife can't drive a stick. The jeep is really hers, but if I have to drive it every now and then,might as well bring it out of its' coccoon, right.

Thanks for the replies.
Rob
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Old 02-27-2006, 10:00 PM   #6
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Be careful, Rob......make it look too good, your time behind the wheel may diminish
A girl & her Jeep: a beautiful thing!

glad to have you with us, welcome
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Old 02-27-2006, 11:39 PM   #7
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Quote:
Originally Posted by localboy
It is a 4.0 litre, 6 cylinder. However it is automatic...

My wife can't drive a stick. The jeep is really hers, but if I have to drive it every now and then,might as well bring it out of its' coccoon, right.

Thanks for the replies.
Rob
Be careful, a 2" BB can add up. A friend of mine bought my RE BB off of me for $100, only a few months old. Put it on his Jeep, his wife didn't like the way it drove, so he decided to buy some OME shocks which cured one of two problems that came with the $100 BB, the next was the dreaded death wobble! Of course it is a rarity to get death wobble with such a small lift, but his Jeep became a victim of the DW. He tried everything, torquing everything to specs balancing and rotating the tires and got a new RE track bar, still hasn't cured it. His $100 BB is now over $400 and counting. Listen to Jerry in regards to clearance, especially if you are going to disco, BB in conjunction with a 1" BL really isn't enough clearance for 33s. Whatver you do, ask around before you make any purchases. That way you will be able to avoid the pitfalls of new Jeep owners, I.E. tube bumpers and chrome. Keep as posted as to the progression of the Jeep. Oh, and try to avoid Quadratec, A.K.A. Jeep essentials, there are smaller companies with a much more knowledgable staff that sells the same things at better prices.

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Old 02-28-2006, 10:32 AM   #8
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I went with the 31" on my 04 with no lift. They fit nicely and the wife can still get in without have to climb too high.
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Old 02-28-2006, 10:40 PM   #9
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Quote:
Originally Posted by SouthTJ
I went with the 31" on my 04 with no lift. They fit nicely and the wife can still get in without have to climb too high.
Did you do any other mods as a result of simply moving to a bigger tire?

I think I will probably move real slow in mods for the jeep. Get used to the changes, see what effect they have on performance before diving in too deep.

What do you all think of the BF Goodrich All-Terrain T/A ko?

If I get the 30s it will be a 5.7% increase in diameter from stock. That should not in and of itself require any other mods should it?

Thanks again.
Rob
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Old 03-01-2006, 01:54 AM   #10
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BFG's All-Terrain T/A KO is an outstanding tire for both offroad and onroad. It's quiet and gets incredibly good tread wear. Offroad, it's great in everything with the exception of deep mud, deep snow, or extreme rock crawling.

Going to a 30" tire will require no mods whatsoever. Neither would 31" tires, that size comes stock on unlifted Rubicons.
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Old 03-01-2006, 09:13 AM   #11
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Quote:
Originally Posted by localboy
Did you do any other mods as a result of simply moving to a bigger tire?
Nope, no other mods needed with 31's.
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Old 03-01-2006, 10:50 AM   #12
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You need to check something First.

PM or email me with the last 8 of you vin and your current mileage.

I will check with DC to see what your rear end gear ratio is.

If you have a 3.07 with that Automatic the 31" may leave you disappointed on the highway due to a lack of performance because you are giving up too much leverage to the ground.

If you have the 3.73 Rear end you will be ok at 30" but 31" might be too much if you like speed.
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Old 03-01-2006, 12:21 PM   #13
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Quote:
Originally Posted by jeeptales
PM or email me with the last 8 of you vin and your current mileage.

I will check with DC to see what your rear end gear ratio is.
Why do that when both of his axles have a steel tag bolted onto them that already have the axle ratio information embossed into them.

The axle ratio tag is located on the differential cover at the 9 o'clock position between two bolts.
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Old 03-01-2006, 01:10 PM   #14
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Quote:
Originally Posted by jeeptales
If you have the 3.73 Rear end you will be ok at 30" but 31" might be too much if you like speed.

I have the 3:73 and 31s and haven't had any problems with speed. At least the legal speeds.
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Old 03-04-2006, 10:54 PM   #15
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I installed a 2" budget boost along with 33/10.50/15 BFGs on 8" wide wheels and had no rubbing with mild off road use. But I got pretty bad vibration from the rear when driving from a stop. So I tried the T case lowering. It helped but still not a cure. So I removed the T case lowering kit, and put in a 1" motor mount lift and the 1 1/4" body lift to clear it. The motor mount lift helped the rear vibration a lot, but not a complete cure. I don't have sway bar discos, but have gone on some pretty rough trails with no rubbing whatsoever. I'm sure the wider 12.50s would rub though. I went with 33/10.50s because I wanted the ground clearance and figured the skinnier tires would give a little less traction and help ease the strain on the pussy D30 & D35.
I also get the death wobble since the 2" Budget boost. I had the tires reballanced and it still DWs once every couple of weeks. But only after hitting pot holes with one or no hands on the wheel. If I see the pot holes coming, I put both hands firmly on the wheel and it is enough to keep the DW from happening. I haven't had an allignment since the lift. I think I need some more caster in my front end. I think a little caster boost will be enough to keep it straight because it rarely wobbles, and only after a big pot hole (we have a lot of pot holes on my way to work). I just haven't had time to take it somewhere to be alligned. I may just dial in a little caster myself. I just hope mine still has some adjustment left.
So be advised, even a "budget boost" can break your budget if it happens to be one of the rare ones like mine that have vibration and or death wobble problems.
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Old 03-04-2006, 11:32 PM   #16
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Wow, you still have vibes with a MML on only a BB? Strange. I would defiently get that taken care of asap so it doesn't lead to more problems down the road. I would recommend buying some Nth Degree rear upper adj control arms. They make a shorter version for Jeeps not running an SYE. This will allow you to set the pinion angle correctly and perhaps massage all of the vibes out. Other companies make rear upper adj control arms but I don't believe they allow for easy manipulation in order to dial in the proper adjustment. You are right, the BB can on rare occasions be quite costly. I saw you posted in the other thread in regards to the BB where I explained my friends current situation that is similar to yours. You might end up needing new lower adj control arms. But first check the alignment, tires balanced and rotated and the torque on the trac bar. If that fails, next up is a new adj track bar. For a RE BB you would need a RE 1600 adj track bar. That is if you chose to go with an RE trac bar. I went with it and it is what finally cured my DW. The DW made my Jeep absolutly miserable to drive. Hope you get it taken care of soon and let us know what you did to cure it.

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