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Discussion Starter #1
Still not sure the definitive answer. 6" Pro Comp lift, 325/65/18 BFG all terrains, Pro Comp extreme wheels; 18 x 9 4.5" back space. I have rubbing galore with this setup. I want to switch to some 20" Rockstars. What tire size and wheel backspacing do you all recommend to avoid rubbing?
 

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Discussion Starter #3
What size are your tires?
 

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PhxBlue said:
Still not sure the definitive answer. 6" Pro Comp lift, 325/65/18 BFG all terrains, Pro Comp extreme wheels; 18 x 9 4.5" back space. I have rubbing galore with this setup. I want to switch to some 20" Rockstars. What tire size and wheel backspacing do you all recommend to avoid rubbing?
You would want these for less rubbing, probably none with a 6" lift.
20 Inch - XD775 Rockstar Black
boltpattern:6x5.5
offset:+10mm
backspacing:5.25 (their number's).
width:8.5
http://www.sfxperformance.com/parts/KMC~XD~Series/20~Inch/page_1.htm
Btw, your current rims have 1" more inside clearance than the stock 18"x8" rims, but stick out 2" more. The 8.5" ones I suggested will have 1/4" more inside clearance and stick out 3/4" more than the stockers, (1 1/4" less than current).

Pretty much any tire will work especially since the 8.5" rims will pull them in some. As an example the Toyo listed below is 13" wide on a ten inch rim, but only about 12.4" on an 8.5" rim. And of course a 10" rim itself, even with factory backspacing, will still out as far as your current 9" rims with 4.5" backspacing.

BFG AT KO
LT285/65R20/E 8 - 10 rim 11.5 on 8.5 34.7" dia. 3860 [email protected]

Toyo MT
LT35x12.50x20 (12.4" width on an 8.5" rim) 35" dia. 3195 [email protected]

Btw, IMO 17s look better, are better off road, and cost way less money for both rims and tires.
.
 

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Discussion Starter #6
NorCal 4x4 said:
Btw, IMO 17s look better, are better off road, and cost way less money for both rims and tires.
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Agreed. Considering the 18's as well.
 

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Discussion Starter #8
The tires are practically brand new. Only 3000 on them. Now I am also seeing hub bore differences on the wheels. What is the correct number i Should be looking for.
 

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PhxBlue said:
The tires are practically brand new. Only 3000 on them. Now I am also seeing hub bore differences on the wheels. What is the correct number i Should be looking for.
I don't know exactly but the 78.1 mm are closer than the 104. But the dealer should know, (and eat the shipping if they're wrong). Some of the wheels are lug centric, so the lug nut will center the rim.
If you have any stock wheels you can measure them to be sure of the bore.
 

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Discussion Starter #10
Alright thanks. You have been a big help!
 

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Discussion Starter #11
I went out and ordered the 18's as you suggested. They came in a 9" with the 5" backspace (aka 0mm offset). Got em from 4wheelparts.com which is local to me. 817 bux after tax. Thanks again for your help.
 
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