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

  1. #1
    Been Around the Block danford.lau's Avatar
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    3.5” back spacing for 35x12.5 too little?

    I’m currently running Cooper STTs with 4” bs (5.2 + 1.25” spacers)

    Will 3.5” bs on 35s be too little ? Stick out too far ? Any concerns about stress on components?

    Please post up photos if you have them . Want examples of 35s and 37s (12.5 width) . I’m eventually going to 37s and want to buy wheels once but want them to work for my 35s without looking goofy

    Thanks


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  2. #2
    Hooked SLO's Avatar
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    Quote Originally Posted by danford.lau View Post
    I’m currently running Cooper STTs with 4” bs (5.2 + 1.25” spacers)

    Will 3.5” bs on 35s be too little ? Stick out too far ? Any concerns about stress on components?

    Please post up photos if you have them . Want examples of 35s and 37s (12.5 width) . I’m eventually going to 37s and want to buy wheels once but want them to work for my 35s without looking goofy

    Thanks


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    How much lift?

    3.5” for 35’s is a little much but perfect for 37’s. It won’t look goofy, just not ideal.

  3. #3
    Been Around the Block danford.lau's Avatar
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    Quote Originally Posted by SLO View Post
    How much lift?

    3.5” for 35’s is a little much but perfect for 37’s. It won’t look goofy, just not ideal.
    3” enforcer with 0.5” spacers . The other beadlocks seem to have 4.75 bs which seems to be too much . Lol I seem to want 4” . Order is getting confirmed tomorrow so want to make sure I get this right


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  4. #4
    Old Timer TrailHunter's Avatar
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    I'll be doing the same... 35's on ATX slabs.... SST's 315's run a hair small so I'm going with Trail Grapplers... I think it looks cool from what I've seen. You are only talking about a 1/2" difference.

  5. #5
    Addict BaddestCross's Avatar
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    I'm running 3" backspacing with my 37s. 4.5" on the wheels with 1.5"spacers.
    20190105_113545.jpg
    Sorry, couldn't find a current front view but I think there's one in my build thread when I installed the 37s.

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  6. #6
    Guy with a Red 2-Door cozdude's Avatar
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    I’m running the atx chamber pros (4” bs) with 37/12.5 coopers and have no issues with turning or flexing. If you wanna stay at 4” then you will be fine for the future.

    At 3.5” you will end up wearing out hub bearings a little quicker due the extra leverage you have with the wider stance.

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  7. #7
    Been Around the Block danford.lau's Avatar
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    Quote Originally Posted by TrailHunter View Post
    I'll be doing the same... 35's on ATX slabs.... SST's 315's run a hair small so I'm going with Trail Grapplers... I think it looks cool from what I've seen. You are only talking about a 1/2" difference.
    Sweet good to know I’m not only one planning to run 35s on beadlocks for a while

    Quote Originally Posted by BaddestCross View Post
    I'm running 3" backspacing with my 37s. 4.5" on the wheels with 1.5"spacers.
    20190105_113545.jpg
    Sorry, couldn't find a current front view but I think there's one in my build thread when I installed the 37s.

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    Wow even wider. Difference isn’t that noticeable to the eye

    Quote Originally Posted by cozdude View Post
    I’m running the atx chamber pros (4” bs) with 37/12.5 coopers and have no issues with turning or flexing. If you wanna stay at 4” then you will be fine for the future.

    At 3.5” you will end up wearing out hub bearings a little quicker due the extra leverage you have with the wider stance.

    IMG_8370.jpg
    I’d run 4” bs but all the beadlocks im finding, esp with deals, are at 3.5”.


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  8. #8
    Old Timer fiend's Avatar
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    3.5” back spacing for 35x12.5 too little?

    Stock backspacing is 6.25”. Anything less puts additional stress on components, primarily unit bearings and ball joints, particularly when combined with oversized tires. Plenty of people run 4” (eg Chamber Pro IIs) or even 3.5” (eg Slabs). You’ll be replacing things more often because they will wear out faster. Just comes with the territory.

    Here’s mine on 37s (Toyo 37x12.50) and Chamber Pro IIs.
    IMG_0252.jpg


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    Last edited by fiend; 01-24-2019 at 02:33 PM.

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    Administrator wayoflife's Avatar
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    What cozdude and fiend said. You just need to be aware of the fact that you’ll be wearing out your ball joints and unit bearings faster. It is for this reason that I’ve started getting wheels with as MUCH back spacing as I can get away with now.


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  10. #10
    Old Timer TrailHunter's Avatar
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    Quote Originally Posted by wayoflife View Post
    What cozdude and fiend said. You just need to be aware of the fact that you’ll be wearing out your ball joints and unit bearings faster. It is for this reason that I’ve started getting wheels with as MUCH back spacing as I can get away with now.


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    So whats the Most you can get away with on a JK with 3-4” of lift , 37’s and a 17x9” wheel? .... 4”?

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