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Can you use Bilstein 6112 coils on a Bilstein 5100 shock body?

Discussion in '3rd Gen. Tacomas (2016-2023)' started by brooksmaddox, Jul 18, 2023.

  1. Jul 18, 2023 at 11:08 AM
    #1
    brooksmaddox

    brooksmaddox [OP] Active Member

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    New member need advice. I have a 2016 Trd Off-road tacoma and have order a set of bilstein 5100 rear shocks and front struts as well as a 1.5 inch add-a-leaf for the back of my truck. I did not want to do the install myself and the shop I took it too said they do not have a spring compressor small enough to change my stock springs to the new 5100’s. I was confused by this from the research that I’ve done and because the bilstein 5100 are made to be able to use stock springs. Anyways at this point I have found some coils from a set of Bilstein 6112 600lb for $125 on FB market and and want to know if those will work on bilstein 5100 struts. Thanks
     
  2. Jul 18, 2023 at 11:58 AM
    #2
    71tattooguy

    71tattooguy Well-Known Member

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    Answer is no. 6112’s coils are different flat bottom
     
  3. Jul 18, 2023 at 12:00 PM
    #3
    memario1214

    memario1214 Hotshot Offroad Moderator Vendor

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    They will not work. And how they don't have a spring compressor "small enough" kind of baffles me as well. Almost all compressors have horizontal adjustment to ake different diameters into account.
     
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  4. Jul 18, 2023 at 12:00 PM
    #4
    brooksmaddox

    brooksmaddox [OP] Active Member

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    Yes I got that answer I was looking at OME 887’s and they seem to be the most popular option for 5100’s any experience fr with those?
     
  5. Jul 18, 2023 at 12:02 PM
    #5
    brooksmaddox

    brooksmaddox [OP] Active Member

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    Yes I was very confused about the spring g compressor as well they even said they tried borrowing a manual one from another shop so I don’t understand.
     
  6. Jul 18, 2023 at 12:04 PM
    #6
    memario1214

    memario1214 Hotshot Offroad Moderator Vendor

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    Trying to get 2" of lift? Solid option, and better than moving up the circlip on a 5100 to get your lift. We can get you them here as well at Hotshot Offroad unless you are going to order them through that shop.

    If they're telling you that the "size" of your spring is the problem though they're likely not going to have a better time with these. They're longer, but no wider.
     
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  7. Jul 18, 2023 at 12:10 PM
    #7
    gudujarlson

    gudujarlson Well-Known Member

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    Find a new shop.
     
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  8. Jul 18, 2023 at 12:11 PM
    #8
    brooksmaddox

    brooksmaddox [OP] Active Member

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    Yes 2 to 2.5 inch in the front is what I want to level it out with 1.5 inch in the back. I think the issue is with the shop but I’ve rethought it and thinking about spending the extra for new coils. What is the difference between 886,887,888? Spring rate?
     
  9. Jul 18, 2023 at 12:13 PM
    #9
    gudujarlson

    gudujarlson Well-Known Member

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    Why do you think a longer spring is better than a shorter spring with a bit of preload? I’ve never fully understood why people combine aftermarket coil springs with Bilstein 5100 shocks.
     
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  10. Jul 18, 2023 at 12:14 PM
    #10
    gudujarlson

    gudujarlson Well-Known Member

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  11. Jul 18, 2023 at 12:17 PM
    #11
    brooksmaddox

    brooksmaddox [OP] Active Member

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    @gudujarlson i think the idea is that with a longer spring you don’t have to compress the spring down for lift that way you get the full performance and compression of the spring instead of a spring that is partially loaded already. Someone else who knows more can answer better
     
  12. Jul 18, 2023 at 12:19 PM
    #12
    gudujarlson

    gudujarlson Well-Known Member

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    But that’s not true. Preload does not cause any issue unless you add so much that coil bind occurs. Preload is standard way in cars, trucks, motorcycles, bicycles, etc to adjust ride height.
     
  13. Jul 18, 2023 at 12:19 PM
    #13
    brooksmaddox

    brooksmaddox [OP] Active Member

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    Anyone have experience using the stock springs with 5100’s. I want the 2 inches of lift so I would preload them on the 5th notch. And how does that look with 1.5 inch I try back. Appreciate the help!
     
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  14. Jul 18, 2023 at 12:20 PM
    #14
    memario1214

    memario1214 Hotshot Offroad Moderator Vendor

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    Think about it this way. If you "preload" a 5100 by way of moving up the circlip you are simply extending the shock shaft to capture that height. If you put a taller spring in to capture the height the shock piston is in the same position that it would have been (roughly) as if you were to have set the circlip height to the "stock" setting. What a lift spring means for us is that you have the lift height that you want + a shock piston floating near the middle of the shock body vs being biased to the bottom of the shock. This leads to fewer "top out" conditions since the shock can travel further before no longer having any stroke remaining.
     
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  15. Jul 18, 2023 at 12:20 PM
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    brooksmaddox

    brooksmaddox [OP] Active Member

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    @gudujarlson yes I agree I think preload is a great option just want to learn more about the other ways to lift.
     
  16. Jul 18, 2023 at 12:22 PM
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    brooksmaddox

    brooksmaddox [OP] Active Member

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  17. Jul 18, 2023 at 12:22 PM
    #17
    gudujarlson

    gudujarlson Well-Known Member

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    That makes no sense to me. Changing the ride height via preload or a different spring has the same effect on the shock position. Are you perhaps thinking of top hat spacers?
     
  18. Jul 18, 2023 at 12:48 PM
    #18
    memario1214

    memario1214 Hotshot Offroad Moderator Vendor

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    No sir, not thinking top hat spacers. That's a fair point though, and you now have me questioning that component of what I thought I knew about suspension. Of course there's going to be different/refreshed spring rates that come with a new coil, but the piston positioning as you have stated "should" be equal. I very well could be overthinking things at the moment too. Currently stuck in a loop... Lemme play around with some shocks here in the shop, and I'll circle back around eventually. I'm happy to change my way of thinking if the science proves itself!
     
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  19. Jul 18, 2023 at 12:53 PM
    #19
    gudujarlson

    gudujarlson Well-Known Member

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    If the shock mounting points are the same and the shock compressed and extended lengths are the same, changing the ride height must change the shock piston position at ride height regardless of how you do it.
     
  20. Jul 18, 2023 at 12:55 PM
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    bkhlrTaco's

    bkhlrTaco's “expletive deleted”

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    Should really measure your own truck to know what it will get you.
    Mine was 1.5" higher in the back stock but I've see people mentioning different measurements on different trucks.
    I went 2.5"F, 1.5" R to keep 1/2" rake.
     

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