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Old 03-13-2013, 10:21 PM   #1
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specs 101?

OK so I am a newb - I need some help figuring out tire/wheel size and psi on tire/rim mod. I know different JK model years run different stock. Figured I would go to the experts

Could someone please explain to me the specs to look for on a rim and if it is listed anywhere on it? I understand prints but havent found a good place to find the measurements for stock rims on my 2009 JK X. I purchased used and the tire is a Hankook Pro Mt size LT265/70R17. Stock according to door panel is P255/75R17. I want to find a set of takeoffs or a set of rims to run down the highway. I use my JK as a daily driver and put about 500 miles on in a week.

Hoping to come up with something easy so I can compare or ask questions on craigslist.

Also with the Hankooks - the tire reads max psi of 80 - what should I be running these at for highway?

Thanks for any info!

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Old 03-14-2013, 02:24 PM   #2
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Originally Posted by shotsy View Post
OK so I am a newb - I need some help figuring out tire/wheel size and psi on tire/rim mod. I know different JK model years run different stock. Figured I would go to the experts

Could someone please explain to me the specs to look for on a rim and if it is listed anywhere on it? I understand prints but havent found a good place to find the measurements for stock rims on my 2009 JK X. I purchased used and the tire is a Hankook Pro Mt size LT265/70R17. Stock according to door panel is P255/75R17. I want to find a set of takeoffs or a set of rims to run down the highway. I use my JK as a daily driver and put about 500 miles on in a week.

Hoping to come up with something easy so I can compare or ask questions on craigslist.

Also with the Hankooks - the tire reads max psi of 80 - what should I be running these at for highway?

Thanks for any info!
Shotsy,

You want to run about 25-30 PSI in your tires. I wouldn't run over 35 in mine. If you stick right around 28-30 you will have decent fuel economy and a pretty good ride.

As for trying to find some take offs, look around in the Forsale Section in the forum and Craigslist. There is always guys selling their take offs to recoup some money from when they upgrade to bigger tires.

If you have any questions, hit me up over PM and I'll help you out

-Zach

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Old 03-14-2013, 02:38 PM   #3
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Sorry to hijack the topic, mine came with 245/75/17 and the door label for it says 35. Should I leave it 35?
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Old 03-15-2013, 08:32 AM   #4
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Sorry to hijack the topic, mine came with 245/75/17 and the door label for it says 35. Should I leave it 35?
Stzd8,

Yea, you will be fine at 35 PSI, you should run a lower pressure with larger mud tires because the higher pressure causes them to wear quicker. I

If you are just running stock tires then stick with the recommended pressure. The higher pressure you can run in the stock tires will equate to more gas mileage on the highway, which is always good.

Shoot me a PM if you have other questions.

-Zach
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Old 03-15-2013, 11:41 AM   #5
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Specs on the stock wheel are cast on the inside of the wheel. Open your tailgate and look at the inside of the spare. Should see 17 x 7.5 cast there. Not positive if all wheels are this way but that's on my Sport S. Found that washing this past weekend.
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Old 03-15-2013, 11:04 PM   #6
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Going to chalk it this weekend - can someone still explain the lug spacing? I have seen variations from 5x4.5 to 5x5 to 5x5.5 Are you measuring from the center of the hole or what? and if anyone knows what is the 09 jk x spec?
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Old 03-15-2013, 11:45 PM   #7
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Going to chalk it this weekend - can someone still explain the lug spacing? I have seen variations from 5x4.5 to 5x5 to 5x5.5 Are you measuring from the center of the hole or what? and if anyone knows what is the 09 jk x spec?
5x5 on your rig
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Old 03-15-2013, 11:59 PM   #8
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Beware of running too low of pressure. I know many like running low pressure for comfort but it isn't really safe. I would never recommend low pressure in a tire. Wouldn't tell someone they can't but wouldn't recommend it either. Just remember the Firestone on Explorer a few years back. The biggest issue was they were running them under pressured. The lower the pressure gets you better feel and the higher the pressure gets better gas mileage. Somewhere in the middle is best wear.

You really shouldn't run under 28 psi or over 37 psi unless it is a specialized tire or bead lock wheels. The stock tires are around 35 psi (Better gas mileage is why). "C" class tires will run less PSI while "E" class would run the higher PSI.
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Old 03-16-2013, 12:40 AM   #9
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Shotsy,
I'm not sure what state that you are in, but if you have a Discount tire Dealer in your area, then stop by and see them. They are very knowledgeable as to what tire pressure cold, would be the best for maximum tire wear and gas mileage.
They are based here in Phoenix, and I have been using them for about 28 years. In fact I just purchased their road Hazard warranty on my new Rubicon tires.
They are the largest independent tire Dealer in the nation.
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Old 03-16-2013, 08:13 PM   #10
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Thanks txrdstr and I will check that out miser

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