A couple of tire model and size questions (what size with stock gears) - JeepForum.com

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post #1 of 18 Old 07-21-2010, 12:01 PM Thread Starter
GraysonJeep
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A couple of tire model and size questions (what size with stock gears)

Thanks for looking at this thread and hopefully giving me some good advice.

My wifes Jk is starting to get to the point of needing new tires...the Dueler revo's are nearing their end point 285/70/17 and have been looking again at the REVO, but possibly a 315/70/17 which is the equiv. of a 34" tire

OR

a 33x12.50 General Grabber AT

With the regular JK automatic transmission and 3.73 ratio (I think that is what her 08 has), are the 34's simply too big for that transmission? Will it bog it down too badly and/or do any damage down the road to the transmission/joints or do I simply just need to stick with the current size or a 33" if I want to change up the tire brand/model?

Any input is greatly appreciated!

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post #2 of 18 Old 07-21-2010, 12:02 PM Thread Starter
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I guess another question is, will the 34's fit without a lift (only a small leveling spacer in the front at the moment).

Thanks!
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post #3 of 18 Old 07-21-2010, 12:34 PM
4wheelgizmo
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If you have the 3.21 gears, going to 34s will bog it down noticebaly. Regarding lifts, the general consensus is that if you go above 33s you'll need a few inches. By the way, do you have any photos of the current setup?
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post #4 of 18 Old 07-21-2010, 01:33 PM Thread Starter
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Here is the current setup:



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post #5 of 18 Old 07-21-2010, 01:34 PM Thread Starter
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I dont think the 3.21's were available in the automatic transmission for 2008. I am pretty sure they were 3.73's in 2008 automatics and 4.11's in the 2007 automatics.
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post #6 of 18 Old 07-21-2010, 01:34 PM Thread Starter
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I am disappointed that the Revos with a 50k warranty lasted under 30k. No off roading, schedule rotation, etc. Wearing even, but just wearing quickly.
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post #7 of 18 Old 07-21-2010, 02:17 PM
4wheelgizmo
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Quote:
Originally Posted by GraysonJeep View Post
I dont think the 3.21's were available in the automatic transmission for 2008. I am pretty sure they were 3.73's in 2008 automatics and 4.11's in the 2007 automatics.

If you have the 3.73 then you might be OK. You'll struggle a little on hills or if you're towing something. Your wife might not notice.
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post #8 of 18 Old 07-21-2010, 03:24 PM Thread Starter
GraysonJeep
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but will the 34's even fit with the current set up??
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post #9 of 18 Old 07-21-2010, 03:29 PM
4wheelgizmo
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Quote:
Originally Posted by GraysonJeep View Post
but will the 34's even fit with the current set up??
I think there will be some rubbing with 34s. An inexpensive BB of a couple inches would remedy that.
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post #10 of 18 Old 07-21-2010, 03:37 PM Thread Starter
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Probably a good reason then to go ahead and do the 2.5" lift that I had been looking at before the tires need replaced in a few months.
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post #11 of 18 Old 07-21-2010, 04:42 PM
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Quote:
Originally Posted by GraysonJeep View Post
Probably a good reason then to go ahead and do the 2.5" lift that I had been looking at before the tires need replaced in a few months.
That's how it starts.....

98 XJ, Pearl Green, 4.5" lift, 32's Daily Driven. BEAT IT! BREAK IT! FIX IT!
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post #12 of 18 Old 07-22-2010, 12:47 AM
RogueSpear2023
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My advice to the OP is if you don't off road in the mud, I would get the BFG AT KOs they work great in almost all terrains, except deep mud, but the bonus is even if you pay a little more I have seen them go to 70K plus with a tire rotation at every 6K.

Max

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post #13 of 18 Old 07-22-2010, 09:03 AM Thread Starter
GraysonJeep
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I have had the AT KO's before and don't care for them much, especially in the rain. They look nice and are a good AT, but they are not very good in the rain.
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post #14 of 18 Old 07-22-2010, 02:09 PM
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The Biggest you want to do on a stock JK is a 33X11.50 or 33X12.50. A 34" on a stock wheel will rub the inner fendor. We have an 07' lifted on 35"'s at it is a dog even with a intake, programmer and exhaust. If you do go to a lift do your self a favor and replace the shafts before you have epic failure.

JJ
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post #15 of 18 Old 07-22-2010, 02:40 PM Thread Starter
GraysonJeep
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I am not on stock wheels. I am soft 8's with a little better offset than the stockers have.

I think I am just going to stick with either 33's or the current tire size depending on which tire I go with (either another set of REVO's at the current size - 285/70/17 - or up to a 33" General Grabber AT)

That will keep it from really dogging out the Jeep on the road and since it doesn't do anything tough off road usually. there isn't a big need for bigger right now.
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