31 or 33" Tires?

[fourmustangs]

31 or 33" Tires?

so needing to replace tires, currently have 31" so trying to decide to stay 31x10.5 or go to 33"
If I go to 33" do i stay with 10.5 or do 12.5 on the width?

my wheels are 15x8

 

[zip04]

What gears do you have? What type of offroading do you do, and if it is moderate what rear axle do you have? Do you have the clearance for 33s (lift, etc.)?

 

[fourmustangs]

First jeep,
plan to go to couple offroad parks nothing serious (play in dirt, etc..lol)
I have 3.73 with Dana 30/35
Currently have 3.5" (its a crappy setup but will change it out)

 

[fourpointzero]

Without seeing a photo, I'd imagine a 3.5" lift would look a little odd with 31's.

Considering you already have a lift and you're gearing is 3.73, I would go to 33's. But you failed to mention if it's an auto or 5 speed manual. Lets us know.

Cheers!


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[Jerry Bransford]

Doesn't it rain heavily in Houston at times? If you have to drive your Jeep on really wet roads much, the 33x12.50 tires will hydroplane a lot more easily and at slower speeds than would happen with 33x10.50 tires. Think using water skis vs. snow skis on water.

Offroad, the 33x10.50 works well in most conditions. The 33x12.50 is the more common choice but don't be afraid to go with the 33x10.50 if you have to contend with water on the streets.

 

[fourmustangs]

added photo. Automatic.

Yes it does flood time to time and thats one reason we got a toy so that the wife or me can drive the jeep instead of the mustang.

 

[Jerry Bransford]

In that case, for safety's sake, I'd go for the 33x10.50 tires.

 

[derekmac]

I think you'd be happy with 33x10.50's, and they'd look good on the Jeep as well. Don't forget to post pics when you get your new tires too.

 

[fljeeper]

Split the difference, 32 x 11.50. I am running that size KO2.

 

[fourpointzero]

Are 3.73's ideal for an auto? I don't have any complaints w my 3.73's and a manual. But when I finally get to putting in a locker, I'll be changing my gearing as well. Looking forward to feeling the difference.


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[Jerry Bransford]

Are 3.73's ideal for an auto?

No. You don't say what model year you have but if it's a 2003 or newer, that automatic is the 4-speed and 3.73 would be horrible for 33's. The 4-speed automatic's overdrive drops the RPMs by roughly 1/3 which means your engine would be lugging on the highway in Overdrive. If your TJ is a 2002 or older, that automatic is the 3-speed which would work a lot better on the highway since it doesn't have an Overdrive to drop the engine rpms excessively like the 4-speed does.

There is an optimal ratio for 33's but you'll have to tell us what year your TJ is. There is a Profile for your Jeep in this forum that you can fill out with all your Jeep information for future questions.

 

[bobthetj03]

Stick with 31's, take those 3.50" coil spacers out, and replace those tired out springs with some new OME 2" springs and rock on.
Your wife will appreciate not needing a step ladder to climb in to drive it, and the 31's will give better road manners.

 

[CodaMan]

Split the difference... you can find several great tires in the 32X11.50 size. That's what I ran.

 

[fourpointzero]

There is a Profile for your Jeep in this forum that you can fill out with all your Jeep information for future questions.

The OP should be tagged in the above comment. As far as I know, my TJ's info is indicated in my profile.






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[fourmustangs]

Yes a 2005 is what i have..
With the 31s i loose traction if i stomp on it currently street tires

What all what i need besides the 2inch springs

 

[fourmustangs]

Stick with 31's, take those 3.50" coil spacers out, and replace those tired out springs with some new OME 2" springs and rock on.
Your wife will appreciate not needing a step ladder to climb in to drive it, and the 31's will give better road manners.

I do like the current height so I dont want to go down....she likes having to climb in a little

 

[Rob80x]

Or go 32x11.50, I am glad I did.

 

[CommandoJoe]

No. You don't say what model year you have but if it's a 2003 or newer, that automatic is the 4-speed and 3.73 would be horrible for 33's. The 4-speed automatic's overdrive drops the RPMs by roughly 1/3 which means your engine would be lugging on the highway in Overdrive. If your TJ is a 2002 or older, that automatic is the 3-speed which would work a lot better on the highway since it doesn't have an Overdrive to drop the engine rpms excessively like the 4-speed does.

There is an optimal ratio for 33's but you'll have to tell us what year your TJ is. There is a Profile for your Jeep in this forum that you can fill out with all your Jeep information for future questions.

I have a 2004 auto with 33x12.5's, 3.73 gears and don't have any complaints - more than enough power around town. Occasionally at freeway speeds if there is too much of an incline I might turn off overdrive for that stretch, but other than that, no problem getting up to freeway speed and cruising at 60-80mph...

 

[Rob5589]

Technically you aren't really at 3.5" of lift due to the factory isolators being removed which are about 5/8". That and your springs are likely sagging with the doubled up spacers. You may be able to get away with 33's on road but have lots of rubbing off.

 

[JMT]

You might go measure your coil springs and spacers to see how much lift you REALLY have. Honestly, it does not look like a 3.5" lift. I think your stock springs are sagging badly. Stock front is 12" and rear is 8". Measure from bottom of spring to top of your spacers, since you don't have any rubber coil isolators. You'll want to get some when you make a change. As someone mentioned, they're 5/8". If you find out where you really are you'll be better able to gauge where you want to be and what to buy. I had stock springs with a 1.75" spacers and my fronts were 13 1/4, so I was sagging 1/2 inch. When I took the spacers off and put on a 2.5" OME my front jumped to 14 3/4". It's so much better