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31/10.5 r15

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  #31  
Old 10-28-2009, 10:42 PM
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hey guys, no shackles, no body lift, might have been a slight torsion crank when it was aligned. i noticed it sat higher when i left. they got it all the way aligned, in spec no pro.
 
  #32  
Old 10-29-2009, 12:15 AM
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sweet.
 
  #33  
Old 11-09-2009, 11:17 AM
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Sorry it took so long...but here it is
the first picture is with the back tire (245/70r15) and the front is the 31x10.5
the second is close up of the front,
the 3rd is the 245/70r15 tire
the 4th is both 31s
and the last is proof that they are 31x10.5r15s

It looks like the front will rub the back part of the fender but it doesn't!
the only time it rubs is at full lock
 
Attached Thumbnails 31/10.5 r15-1108091308.jpg   31/10.5 r15-1108091308a.jpg   31/10.5 r15-1108091308b.jpg   31/10.5 r15-1108091625.jpg   31/10.5 r15-1108091626.jpg  

  #34  
Old 11-09-2009, 11:21 AM
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Hmm...interesting. So here's a better question. Have you taken it off roading since you put them on? or have you just been driving around on nicely paved streets. I'm just curious because I want to know if you will run into problems when you're off roading at full compression.
Also, were you the sole owner of the vehicle? Are you positive it hasn't been lifted in ANY way (tbar cranks, shackles etc.) in the past? It doesn't really look it (the back is a bit high though) but I'd like to be sure..
 
  #35  
Old 11-09-2009, 11:35 AM
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I think the only reason it looks high in the back is because I'm on a hill and there's a bit of a mound on the drivers side of my truck.

As for the sole owner issue I'm the 3rd or 4th owner I can't remember but i know the shackles weren't touched.

For the off roading, I haven't been yet. something tells me I may rub if I do though. but around me theres really no place to go off roading unless i go to rausch or something. its just mudding here so i think i will be good
 
  #36  
Old 11-09-2009, 01:14 PM
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Your sidewall says 31x10.5, but the proportions are off. A 31" OD tire should have a sidewall larger than the rim from center to outer lip. A quick comparison shows this not to be true in those pictures. The proportions show your tire to be approximately 29.5" OD. And that is going horizontally comparing the rim (minus the lip) to the outer extents of the tire.
 
  #37  
Old 11-09-2009, 01:21 PM
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Originally Posted by swartlkk
Your sidewall says 31x10.5, but the proportions are off. A 31" OD tire should have a sidewall larger than the rim from center to outer lip. A quick comparison shows this not to be true in those pictures. The proportions show your tire to be approximately 29.5" OD. And that is going horizontally comparing the rim (minus the lip) to the outer extents of the tire.
Well that is way above my head when it comes to explanations lol. So you're saying it's not actually fitting a 31" tire on stock height?
 
  #38  
Old 11-09-2009, 03:58 PM
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Just take the picture into your favorite photo editing suite and start measuring.

I just moved in a bit from the edges of the rim (about where the machined lip ends) to account for where the bead of the tire sits (this is where the 15" rim diameter comes from). This measurement from the image is the scaled diameter of the rim. The scaled rim width divided by the actual rim (15") width gives you a scale ratio.

Then measure the overall diameter of the tire. Now, divide the scaled tire diameter by the scale ratio and, bingo, you have your tire diameter.

*EDIT* - Here is the information you need:

Back tire comparison:
rim scaled diameter = 15.38-9.69 = 5.69
scale factor = 5.69/15 = 0.379333
tire scaled OD = 18.06-7.12 = 10.94
tire OD actual = 10.94 / scale factor = 10.94 / .379333 = 28.8"


Front tire comparison:
rim scaled diameter = 15.43-9.69 = 5.74 (scaled rim diameter)
scale factor = 5.69/15 = 0.3826666
tire scaled OD = 18.12-7.12 = 11
tire OD actual = 11 / scale factor = 11 / .3826666 = 28.7"

Not that this dimensioning is exact, but shows that these tires are not 31" OD tires regardless of what the sidewall states. With these tires, the OD can vary brand to brand even though the sizing may state 31" OD, it does not mean that is what you actually have.
 
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