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Building a Bumper?Ruffstuff Axle Simple Swap Kit!~Artec JK 1 TON SWAP~

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Unread 05-05-2014, 08:25 PM   #1
yellowismellow
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Just lifted, now the tire questions...

2004 wj with a 4.0 and 247. I just installed 2" IRO springs with new isolators and bilstein 5100 shocks from kolak. Currently I'm running the stock 245/70/16 tires and wheels. Looking for tires to put on a set of JK rubicon rims that I scored for cheap in mint condition.

My question...yes, what the largest tire I can move up to without trimming? From what I see, tires that will equal the circumference of my current tires(245/70/16), would be a 245/65/17. Correct me if I'm wrong on these tire conversions. What size would be best? This wj is 95% street as it's my wife's, yet we use it to haul all my gear when going on long wheeling trips in my TJ. 245/75/17? /255/65/17? 235/75/17?? Also, how bad is the speedometer going to be? I noticed there's not gear to swap out, and is sensored. Not too concerned about being off a mph or 2, more worried about transmission issues arising with a drastic change in size.

Lift install went smoothly. All control arms replaced with stock new replacements, rides great even without getting an alignment for a few days yet.

Here's a pic. What tire would you go with?
Thanks for the advice.


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Unread 05-06-2014, 05:02 AM   #2
yellowismellow
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100 views and no responses? I know this topic is brought up all the time, but help me out guys!
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Unread 05-06-2014, 05:49 AM   #3
braddf
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most people say 245/70/17 for that unless you don't offroad much then you could go maybe a tad bigger. 245/70 to be safe tho
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Unread 05-06-2014, 05:59 AM   #4
HamJam
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I have a 3" Iro lift and Jk take offs and run 245/75/17 duratracs and they only rub very slightly in reverse with steering cranked.
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Unread 05-06-2014, 06:22 AM   #5
yellowismellow
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Thanks guys. I'm looking for a decent all terrain tire to stick under her wj
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Unread 05-06-2014, 07:09 AM   #6
PirateB
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Toyo open country a/t II great tire!

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Unread 05-06-2014, 07:59 AM   #7
ChrisHager
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If you're sticking with stock backspacing, you'll want a 245/75R16 (245/70R17). I went with Goodyear Wrangler DuraTracs in that size and love them. I found my speedometer is now spot on (they typically are not when the vehicle is in stock form).
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Your symptoms sounds just like what it does when it's not doing what it should because of how it is.
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Unread 05-06-2014, 12:11 PM   #8
jpat30
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I run 245 75 16 KM2 and I found that my speedo is now dead on as well as measured with GPS.
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Unread 05-06-2014, 12:25 PM   #9
gold01wj
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FYI speed is electronically controlled from the rear abs sensors... A speedo drd or super lift true speed are the best way to fix modern signal fed speedometers... I have the drd on my wj and the true speed on my silverado. Both work great. I think the drd is a bit easier to program tho
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Unread 05-06-2014, 12:27 PM   #10
poj2001
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Quote:
Originally Posted by ChrisHager View Post
If you're sticking with stock backspacing, you'll want a 245/75R16 (245/70R17). I went with Goodyear Wrangler DuraTracs in that size and love them. I found my speedometer is now spot on (they typically are not when the vehicle is in stock form).
Thats good to know for those who lift, but kinda crappy for the majority of the world that drives it stock. My 01 WJ speedometer was off by about 3mph with stock tires.

I am picking up an 04 WJ Friday and plan on putting a 2" lift in, good to know 245/70R17 will fix the speedo
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