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Old 07-04-2018, 10:15 PM
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Show me your stock JKUs sitting on 31s!

My friend is hooking me up with a set of 31s, but I don't know if I should buy them off of him. I need a little convincing... I was hoping someone would be running this size!

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Old 07-05-2018, 07:06 AM   #2
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You realize those are smaller than stock, right? Why would you do that? Are you desperate for tires and getting them super cheap?

People sell take-offs all the time for cheap.
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Old 07-05-2018, 02:49 PM   #3
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I agree. But here's a pic of mine from 2011 with the stock 32's.




j1 by Wandell Asbell, on Flickr
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Old 07-07-2018, 11:27 AM   #4
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I changed from the stock 245 75 R17 's (standard size for export many export Wranglers). To a 265 65R 17 tire because of price and availability in South Africa . After about a year of running the tire I installed a Teraflex spacer leveling kit to improve the breakover angle and increase the clearance between the bump stop and the axle to prevent the Jeep from bottoming out when you hit a speed bump. ( my Jeep has a heavy Diesel engine).
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Old 07-07-2018, 11:37 AM   #5
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Quote:
Originally Posted by DAVEH View Post
I changed from the stock 245 75 R17 's (standard size for export many export Wranglers). To a 265 65R 17 tire because of price and availability in South Africa . After about a year of running the tire I installed a Teraflex spacer leveling kit to improve the breakover angle and increase the clearance between the bump stop and the axle to prevent the Jeep from bottoming out when you hit a speed bump. ( my Jeep has a heavy Diesel engine).
Tried to post pictures but there seems to be a problem with the app will try and post later.
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Old 07-07-2018, 12:01 PM   #6
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Here's mine when it was with stock 31"; factory mud terrain (255\75\17)
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Old 07-07-2018, 02:19 PM   #7
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I like those wheels. Wish they weren't so pricey though...
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Old 07-09-2018, 12:17 PM   #8
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Here's mine when it was with stock 31"; factory mud terrain (255\75\17)
Stock is 32's. Not 31's.

https://tiresize.com/tiresizes/255-75R17.htm
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Old 07-09-2018, 01:51 PM   #9
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I assumed that it was 31's; my Flashcal was displaying 30.75 on tire size.
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Old 07-09-2018, 02:07 PM   #10
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I assumed that it was 31's; my Flashcal was displaying 30.75 on tire size.
Not sure what you mean by the flashcal displaying something. Is that what your Jeep is currently set for or is that the OEM setting?

Remember that 32's will generally measure to something less than 32 and that as they wear down they'll get shorter still. That doesn't change the fact that they're technically still 32's. If you switched to 31's they'd be smaller and could measure down to closer to 30 or below.

There's discussions here about various "35's" and which are closer to 35" than others.

With the OP considering going to 31's, you can assume they'll be tangibly shorter than OEM wheels and will almost certainly look smaller than what you've got on yours.

Of course, he hasn't come back to explain himself so this whole discussion is probably pointless.
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Old 07-09-2018, 09:09 PM   #11
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You'll probably get a better response if you give an actual tire size and wheel size...(such as P255/75R17) instead of just 31 inch..

A 245/75R16 is a 31 inch tire as is a 265/65R17 as is a 255/65R18.
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Old 07-10-2018, 07:57 AM   #12
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Not sure what you mean by the flashcal displaying something. Is that what your Jeep is currently set for or is that the OEM setting?

.
When I bought my 315/70R/17 and connected my F5 Flashcal to set the new tire size the factory value that set was 30.75.

By the way; I set the 315's to 34.00 and that gave me an accurate speed reading.
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Old 07-10-2018, 10:55 AM   #13
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2012 Wrangler Rubicon

Here is my stock Wrangler named "Harley."
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Old 07-10-2018, 12:04 PM   #14
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BF Goodrich sells the 255/75R17 KM2 tire as a 32 inch tire. The image below is a screen grab from their web page at https://www.bfgoodrichtires.com/tire...errain-t-a-km2

In reality, very few tires are actually what the manufactures say they are. I have an unused, unmounted KM2 sitting in my garage. The tire is a bit less than 32 inches.. (31.8 inches when uninflated and unmounted). 31.8" is closer to 32" than 31".



I know.. I spend too much time on details
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Old 07-10-2018, 12:47 PM   #15
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Remember that the height changes a little based on the air pressure, weight of the vehicle, width of the rim, and probably things I'm not thinking of right now.

Tire measurements are an odd lot to begin with. Trying to pin them down to an accurate height measurement is nigh on impossible.

So we all just agree with certain dimensions equating to a "32".
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Old 07-15-2018, 11:57 AM   #16
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ID:	4078861stock JKU with 31" (265 65 R 17).


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Old 07-15-2018, 12:03 PM   #17
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With Teraflex (spacer) Leveling kit installed.



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Old 07-24-2018, 09:40 PM   #18
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Here’s mine stock.
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