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Old 05-21-2012, 10:07 PM   #1
HardSilverTJ's Avatar
Join Date: Jan 2012
Location: Panama City
Posts: 172
Why does this say only up to 31"?

I thought about putting a spacer lift, decided against it because my coils need replaced anyway. So I was looking at this lift kit, but it says only up tot 31" tires with factory back space??? Can someone explain this to me please?

Rough Country 2.5" Leveling Suspension Lift Kit, With Performance 2.2 Shocks for 6 Cylinder Engine RC-P653

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Old 05-21-2012, 10:23 PM   #2
Duramaxxed's Avatar
Join Date: Mar 2011
Location: Hamptons, Long Island, New York
Posts: 1,181
I'd Guess they Recommend that Tire Size for Max Articulation and Flex.

'06 KJ CRD
'06 Ram 2500 Cummins
'07 Silverado 2500HD Duramax
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Old 05-21-2012, 10:35 PM   #3
UnlimitedLJ04's Avatar
Join Date: Aug 2010
Posts: 8,487
Originally Posted by HardSilverTJ View Post
it says only up tot 31" tires with factory back space??? Can someone explain this to me please?
the biggest tires you can fit on the factory backspacing of 5.5" is a 31x10.50R15 tire, and even that will rub the control arms with 15x7 wheels, and barely clears with 15x8 wheels.

anything bigger and you get major control arm rub issues, and tire sidewall damage problems from rubbing the rear spring perch. thats true irrespective of advertised lift height.

Go stick your hand between the rear tire and the frame. You'll see what I mean.
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