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Thread: Backspacing questions on afternarket wheels

  1. #1
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    Backspacing questions on afternarket wheels

    Hi guys can someone clarify my future tire/wheel combo regarding clearance?

    I will be going to the Cooper STT Pro 37×13.50×17 tires.

    My current aftermarket wheels are 17×8.5 with a backspacing of 4.5.

    Im running the current EVO leveling kit but will most likely need to lift up when I go to 37s.

    Im wondering if this tire/wheel setup will work. If not sure how much backspacing will be needed so I can wheel freely without massive rubbing. Im looking at beadlocks (B.A.D. or Hutchinson) if my current wheels wont fit well.

    New on wheel adapters but if I had to use those for a while to fit my current wheels for the 37s Im not sure how thick of a wheel adapter I would need.

    Any help much appreciated.

    Sent from my SM-G892U using WAYALIFE mobile app
    Last edited by TxCoastie; 06-25-2019 at 05:23 PM.

  2. #2
    Addict BaddestCross's Avatar
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    You'll need to be at least 3.5" BS to run 37s. I've got 4.5" BS wheels and I'm running 1.5" spacers with no issues rubbing on the frame.

    You'll probably need to be at 3" of lift minimum with a lot of trimming and cut/highline fenders to run them as well.



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  3. #3
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    Thanks.

    Was this mod also necessary for your 37s?

    https://wayalife.com/showthread.php/...top-Adjustment

    Sent from my SM-G892U using WAYALIFE mobile app

  4. #4
    Nothing but a Thing desertrunner's Avatar
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    I'm running Cooper 37x13.5 on a Evo leveling kit (on a 2dr) I'm right about 3" of lift maybe a smidge taller. My wheels are 17x9 4.5" of back space and I needed spacers to make them not rub a ton. I believe 1.5" is the smallest spacer you can buy that's what I have so I have effectively 3" of back space. With stock width axles and the 37x13.5 if I were to buy new wheels I wouldn't buy anything with more than 3.5" of backspace for my current setup.

    First is without spacers rubbing all sorts of stuff not at full lock. Second is with spacers full lock clearing just fine 844757514.jpg20180630_161356.jpg

    Sent from my SM-G950U using WAYALIFE mobile app
    12' 2dr Gecko Sport 6 speed
    PR44, ARBs, 4.88s, 35 spline rear, Adams 1350 Front & Rear, Rubi T-case, Rubi sway bar + Evo no limits, Evo armor & skids, 37/13.50" Cooper STT Pro, Evo 2" plush / OME med duty springs

    ***SOLD*** 08' JKU Rubicon 6-speed Stone White, 3.5" RK lift, 37" KM2s and lots more.
    ***CURRENT DD*** 16' F150

  5. #5
    Addict BaddestCross's Avatar
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    Quote Originally Posted by TxCoastie View Post
    Thanks.

    Was this mod also necessary for your 37s?

    https://wayalife.com/showthread.php/...top-Adjustment

    Sent from my SM-G892U using WAYALIFE mobile app
    No, but 2 doors and 4 doors have a different steering radius, so your mileage may vary.



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  6. #6
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    Quote Originally Posted by desertrunner View Post
    I'm running Cooper 37x13.5 on a Evo leveling kit (on a 2dr) I'm right about 3" of lift maybe a smidge taller. My wheels are 17x9 4.5" of back space and I needed spacers to make them not rub a ton. I believe 1.5" is the smallest spacer you can buy that's what I have so I have effectively 3" of back space. With stock width axles and the 37x13.5 if I were to buy new wheels I wouldn't buy anything with more than 3.5" of backspace for my current setup.

    First is without spacers rubbing all sorts of stuff not at full lock. Second is with spacers full lock clearing just fine 844757514.jpg20180630_161356.jpg

    Sent from my SM-G950U using WAYALIFE mobile app
    Looks great!

    Have you really worked your rig (rock crawling?) If so any problems with the spacers afterwards?

    Sent from my SM-G892U using WAYALIFE mobile app

  7. #7
    Addict BaddestCross's Avatar
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    Quote Originally Posted by TxCoastie View Post
    Looks great!

    Have you really worked your rig (rock crawling?) If so any problems with the spacers afterwards?

    Sent from my SM-G892U using WAYALIFE mobile app
    I don't know about him, but I've been running the spacers for about a year with several trail runs and no issues.



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    Build Thread - Adventures of Fiona - https://wayalife.com/showthread.php?t=47407
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    '08 JKR Rescue Green 2-Door

  8. #8
    Nothing but a Thing desertrunner's Avatar
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    Quote Originally Posted by TxCoastie View Post
    Looks great!

    Have you really worked your rig (rock crawling?) If so any problems with the spacers afterwards?

    Sent from my SM-G892U using WAYALIFE mobile app
    Not a lot of rock crawling where I'm at in MT but I took it to Moab and I had no issues with them. I check the torque on them from time to time and they have yet to budge.

    20180822_095907.jpg

    Sent from my SM-G950U using WAYALIFE mobile app
    12' 2dr Gecko Sport 6 speed
    PR44, ARBs, 4.88s, 35 spline rear, Adams 1350 Front & Rear, Rubi T-case, Rubi sway bar + Evo no limits, Evo armor & skids, 37/13.50" Cooper STT Pro, Evo 2" plush / OME med duty springs

    ***SOLD*** 08' JKU Rubicon 6-speed Stone White, 3.5" RK lift, 37" KM2s and lots more.
    ***CURRENT DD*** 16' F150

  9. #9
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    Great pics!

    If I dont get spacers but get new wheels that are 17x9 with 3.5 backspacing I should be good (other than a lil more lift) correct?

    Sent from my SM-G892U using WAYALIFE mobile app
    Last edited by TxCoastie; 06-25-2019 at 04:11 AM.

  10. #10
    Nothing but a Thing desertrunner's Avatar
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    Quote Originally Posted by TxCoastie View Post
    Great pics!

    If I dont get spacers but get a wheel that is 17x9 with 3.5 backspacing I should be good (other than a lil more lift) correct?

    Sent from my SM-G892U using WAYALIFE mobile app
    Can't see why that wouldn't work
    If I were going to buy new wheels today I would go with 3.5" backspace and ditch the spacers

    Sent from my SM-G950U using WAYALIFE mobile app
    12' 2dr Gecko Sport 6 speed
    PR44, ARBs, 4.88s, 35 spline rear, Adams 1350 Front & Rear, Rubi T-case, Rubi sway bar + Evo no limits, Evo armor & skids, 37/13.50" Cooper STT Pro, Evo 2" plush / OME med duty springs

    ***SOLD*** 08' JKU Rubicon 6-speed Stone White, 3.5" RK lift, 37" KM2s and lots more.
    ***CURRENT DD*** 16' F150

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