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  1. #1
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    Reverb with Stumpjumper Carbon Frame? Does 4mm hose exist?

    So the hole for the dropper post is 4mm and the Reverb hose is 5mm. So is every hydraulic brake hose I can find.

    Does 4mm hose exist? The hose doesn't route straight, so it is not a simple "drill the hole a bit bigger" like on the alloy frames.

    Ideas? (Yes, I am set on the reverb)


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  2. #2
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    With fittings, you might be able to get this to fit somehow. 4mm OD x 3.3mm ID Black 25m (Priced Per Roll) Nylon Tubing | Fastenal

  3. #3
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    Reverb with Stumpjumper Carbon Frame? Does 4mm hose exist?

    Don't thousands of people run Reverb posts with a carbon Stumpjumper frame? There must be a good solution...

    (Appreciate the poly tubing recommendation but would prefer bike brake hose if it exists)


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  4. #4
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    I dismount he shock and route it thru the shock mount on the exterior. All u need is one more external cable guide that is adhere on

  5. #5
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    Reverb with Stumpjumper Carbon Frame? Does 4mm hose exist?

    Haven't done it yet, but I think I found a good solution. I cut apart a piece of Jagwire hose today - the inner liner that holds the fluid is just a plastic tube, 4mm or less (didn't measure but it fits).

    I think I will be taking a section of hose, keeping the outer sheathing up to where it enters the frame, jamming the end of the sheathing into the frame hole for positioning, and cutting the rest of the hose down to the liner for insertion into the frame. The part from where it exits under the shock to the post head won't have protective sheathing, but I don't think it will be a problem.

    Will post after trying it out.

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  6. #6
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    I recommend that you do a test outside of the bike frame first, that inner liner will expand and maybe burst, without the constrictive and protective sheathing in place.

  7. #7
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    I have the reverb stealth on my 2013 FSR evo.

    I used a 4 foot piece of shifter cable and used spray adhesive to wrap sand paper around the cable. Run the sandpaper cable thru the hole and enlarge it just a bit to get the hydraulic hose to fit.

  8. #8
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    Quote Originally Posted by chpfly View Post
    I have the reverb stealth on my 2013 FSR evo.

    I used a 4 foot piece of shifter cable and used spray adhesive to wrap sand paper around the cable. Run the sandpaper cable thru the hole and enlarge it just a bit to get the hydraulic hose to fit.
    Did you do this with the carbon m

  9. #9
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    Quote Originally Posted by chpfly View Post
    I have the reverb stealth on my 2013 FSR evo.

    I used a 4 foot piece of shifter cable and used spray adhesive to wrap sand paper around the cable. Run the sandpaper cable thru the hole and enlarge it just a bit to get the hydraulic hose to fit.
    Did you do this with the carbon model or aluminum?

  10. #10
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    Re: Reverb with Stumpjumper Carbon Frame? Does 4mm hose exist?

    2013 evo is carbon.

  11. #11
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    Reverb with Stumpjumper Carbon Frame? Does 4mm hose exist?

    I ended up peeling the outer plastic liner off the back half of the hose, running the inner tube covered in braided mesh through the frame, and recoating the back half of the hose using heat shrink tubing.

    Works and looks great.

    The outer liner isn't going to be a problem, pressure isn't very high in a reverb hose (the fittings on the end are nowhere near as secure as what is used on brakes).

  12. #12
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    Reverb with Stumpjumper Carbon Frame? Does 4mm hose exist?

    Did you find a solution to this in the end ? Are there any thinner 4mm hydraulic hoses available ? Thanks


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  13. #13
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    Reverb with Stumpjumper Carbon Frame? Does 4mm hose exist?

    I never found 4mm hose. The solution I outlined above with heat shrink works great.


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  14. #14
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    On my Stumpy Carbon, all you need to do is CAREFULLY drill the hole to 4mm.....and then install the reverb as normal..

  15. #15
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    Quote Originally Posted by kroe View Post
    I never found 4mm hose. The solution I outlined above with heat shrink works great.


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    Can i ask what hose did you use?

    Thanks

    Quote Originally Posted by ritchief View Post
    On my Stumpy Carbon, all you need to do is CAREFULLY drill the hole to 4mm.....and then install the reverb as normal..

    Yeah i was going to do this and file the opening to fit the thicker hose - Not sure i fancy doing it though on a new frame.

  16. #16
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    Reverb with Stumpjumper Carbon Frame? Does 4mm hose exist?

    I used the stock reverb hose, just cut the casing off the back half with a razor blade.


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  17. #17
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    Ahh ok thankyou - I might give it a go.

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