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Thread: 3.5 back spacing for 35x12.5 too little?

  1. #11
    Nothing but a Thing boardsurfer's Avatar
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    3" lift, 37/13.50 Coopers, 3.5" BS Machetes.

    IMG_20180303_154034.jpg

    IMG_20180618_121407.jpg

    IMG_20180704_171652.jpg


    Exact same setup with 315/70/17 (35s) Coopers.

    IMG_20170813_185841_05.jpg

    IMG_20170916_173130.jpg

    IMG_20171007_133843.jpg

    Balljoints and unit bearings will die an early death. 15-20k miles at best if you're hitting a lot of trails - that was my experience.

  2. #12
    Administrator wayoflife's Avatar
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    3.5 back spacing for 35x12.5 too little?

    Quote Originally Posted by TrailHunter View Post
    So whats the Most you can get away with on a JK with 3-4 of lift , 37s and a 17x9 wheel? .... 4?
    On a JK? Depends if its a 12.50 or a 13.50. With a 13.50, Id say 4 like what youd get on a Chamber Pro II and even with that, youll still have some minor rubbing.


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  3. #13
    Resident Smartass OverlanderJK's Avatar
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    Since not a single person has posted a picture of what you want, here is 35s with 3.5 backspacing.

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  4. #14
    Knows a Thing or Two danford.lau's Avatar
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    Thanks guys super helpful . Doesnt seem like its easy to find a 4 back spaced beadlock .. lot at 3.5 and 4.75 . Are lots of folks running spacers with the 4.75 to get back down to 4 or 3.75?

    This is my daily at about 15k per year so yearly ball joints and unit bearing replacements seems brutal


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  5. #15
    Knows a Thing or Two danford.lau's Avatar
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    To leave room for the possibility for coil overs and 37s down the road .. Ill prob stick with the Machetes . Hell at some point illl get a daily driver


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  6. #16
    Been Around the Block critter812's Avatar
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    Quote Originally Posted by danford.lau View Post
    Thanks guys super helpful . Doesnt seem like its easy to find a 4 back spaced beadlock .. lot at 3.5 and 4.75 . Are lots of folks running spacers with the 4.75 to get back down to 4 or 3.75?

    This is my daily at about 15k per year so yearly ball joints and unit bearing replacements seems brutal


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    I have had great luck i have put 25k on mine in the last year with 3.5" slabs with 35's and no issues with my ball joints or unit bearings yet.

    jeep.jpg

  7. #17
    Administrator wayoflife's Avatar
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    Quote Originally Posted by danford.lau View Post
    Thanks guys super helpful . Doesnt seem like its easy to find a 4 back spaced beadlock .. lot at 3.5 and 4.75 . Are lots of folks running spacers with the 4.75 to get back down to 4 or 3.75?

    This is my daily at about 15k per year so yearly ball joints and unit bearing replacements seems brutal


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    I really see no point in running spacers if youre buying new wheels. Even with 4 of back spacing, your ball joints and unit bearings will still see more wear than stock. In other words, I would give it too much weight in making your decision. 3.5 is without question the most common back spacing out there and youll have a lot more options with it.

    If most of your driving is on the highway, your joints and bearings will last for a while. Hard and fast driving across the desert is whatll really get them to wear out sooner than later.


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  8. #18
    Nothing but a Thing RESURECTIONJK's Avatar
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    Quote Originally Posted by danford.lau View Post
    Thanks guys super helpful . Doesnt seem like its easy to find a 4 back spaced beadlock .. lot at 3.5 and 4.75 . Are lots of folks running spacers with the 4.75 to get back down to 4 or 3.75?

    This is my daily at about 15k per year so yearly ball joints and unit bearing replacements seems brutal


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    If youve got the $$$$ You could probably get trail ready to build you what youre wanting. I think you can pretty much get anything you want from them.

  9. #19
    Knows a Thing or Two danford.lau's Avatar
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    Quote Originally Posted by wayoflife View Post
    I really see no point in running spacers if youre buying new wheels. Even with 4 of back spacing, your ball joints and unit bearings will still see more wear than stock. In other words, I would give it too much weight in making your decision. 3.5 is without question the most common back spacing out there and youll have a lot more options with it.

    If most of your driving is on the highway, your joints and bearings will last for a while. Hard and fast driving across the desert is whatll really get them to wear out sooner than later.


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    thanks . Diving in head first then . Beadlock ordered, regear and revolution shafts going in this weekend . Now just need time to get out to desert more


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  10. #20
    Addict Brute's Avatar
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    35's with 3.5" bs

    IMG_0778.jpg
    Last edited by WJCO; 01-24-2019 at 05:34 PM.

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