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  1. #1
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    rune pedal kick when suspension compresses

    I have heard of people having pedal feedback when climbing with a small granny gear, but I get a really annoying kick whenever i go off a drop or the rear suspension compresses while coasting. It makes the hub engage very hard, makes a ton of noise, and its starting to get on my nerves. Is there any way to cure this?

    I am running 1x10, with a 11-36 cassette, 32t chainring,and short cage sram derailer.

  2. #2
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    Mine doesn't do that. In the granny... yeah sometimes, but not in the middle.
    "Listen here you beautiful *****, I'm about to **** you up with some truth"

  3. #3
    FM
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    Iím running an identical drivetrain (edit- although I'm running a mid-cage), and have never noticed anything like that. But Iím confused by your post:

    Quote Originally Posted by helidave View Post
    but I get a really annoying kick whenever i go off a drop or the rear suspension compresses while coasting. It makes the hub engage very hard, makes a ton of noise, and its starting to get on my nerves.
    Usually when people speak of pedal kickback, itís while they are pedaling. Iím not sure how you would feel it while coasting. Wondering if youíre feeling something else- suspension spiking or drivetrain issues?
    Last edited by FM; 01-25-2012 at 05:39 PM.

  4. #4
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    Freehub body might be locking up?
    "Listen here you beautiful *****, I'm about to **** you up with some truth"

  5. #5
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    thoughts?


  6. #6
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    Quote Originally Posted by helidave View Post
    thoughts?

    Thats normal for a bike with that much chain growth.
    I noticed the kick landing jumps when I first got the bike, but no longer.
    The feedback while climbing in granny is always noticeable

  7. #7
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    if it wasnt for the hub noise i would think it would be rebound set too fast. possibly some kind of hub issue??

  8. #8
    FM
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    It's really hard to say, your cassette is spinning backwards as the suspension compresses... obviously that wouldn't happen while riding the bike with your feet on the pedals.

    One thing I can say for certain... if you are coasting, you should not be feeling any kickback through your pedals when the suspension compresses. The derailer would be absorbing the chain growth, and your freehub wouldn't be engaged so the cranks aren't under chain tension. Pedaling is a different story...

    Pure speculation here: perhaps the the rune requires a mid-cage r. derailuer to absorb the amount of chain growth caused by suspension compression, with your gearing & chainguide? But if that was the case, I'd suspect you would be going through rear derailuer hangers frequently....


    However, aside from your short cage derailuer, we have identical drivetrains and I've never felt any kickback while coasting.

    chainline and freehub drag are some other possibilities... pure speculation (what else is the intraweb goof for eh?)

  9. #9
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    Remove your chain and compress your suspension like in the video. My guess is its your hub.

  10. #10
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    Looks like the freehub is dragging
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  11. #11
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    FM, it's more the noise than a feeling in the pedals. I don't always feel it. It's hard to explain but more than a few people I ride with have commented on the noise after following me down a rough section of trail.

    I took the hub apart and cleaned/lubed it, we'll see if that helps.

  12. #12
    FM
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    Quote Originally Posted by helidave View Post
    FM, it's more the noise than a feeling in the pedals.
    I took the hub apart and cleaned/lubed it, we'll see if that helps.
    Right on. Hub/ freehub OH is the logical place to start....swapping wheels with a buddy might help you isolate the problem too.
    Bad chainline (too many spacers) and/or dragging pulley in your chainguide could also be potential culprits.
    Good luck and keep us posted!

  13. #13
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    If it's just a noise it could be something totally different all together.
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  14. #14
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    well, still does it. I took the idler off the chainguide, and that didn't help either. Not running any spacers, chainline is fine.

  15. #15
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    Stalking FM's posts for his new twenty-giner pics/content.

    The vid 100% makes it sound like it's your freehub.

    That said, with an 11-36 cluster, I think you should have a mid-cage derailleur to better accommodate the range of gears and the chain growth during compression + take up the extra slack when you're in the smaller cogs. Not sure if that's the issue or not, but short cage derailleurs really work best with a dh cassette without that large of a range of cogs (e.g. 11-21 to 11-28).

  16. #16
    FM
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    Quote Originally Posted by ebxtreme View Post
    Stalking FM's posts for his new twenty-giner pics/content.
    I'll organize your personal test ride once the trails dry out!

    Quote Originally Posted by ebxtreme View Post
    That said, with an 11-36 cluster, I think you should have a mid-cage derailleur to better accommodate the range of gears and the chain growth during compression + take up the extra slack when you're in the smaller cogs.
    I'm thinking this way too, now that you say it's the noise not the kickback that's bothering you. A mid cage der. can absorb more slack in the chain (but will require a longer chain). Short cage is really not made for bigger cogs like the 36t.

  17. #17
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    Its the freewheel. Watch the video. The cassette backs up ever so slightly when the suspension rebounds and moves forward when the suspension compresses. The sound is in sync with these movements. Though I wouldn't say there is anything wrong with the freewheel. My thinking is your chain is too short. Try adding a few links and see if it helps. A mid cage derailleur would be a better option as well. Did you try compressing the bike with out the chain on?

  18. #18
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    yea, no noise without the chain because the hub doesn't move. I'll try a med. cage and see what happens

  19. #19
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    I get the same loud bang sometimes when I land, on my spitfire. I've come to the conclusion that its just the noise of the hub engages and echoing throughout the wheel and frame.

    What hub is it? Mine is a Hope.

  20. #20
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    the question isn't what's making the noise, i know its the hub. What i want is to make it stop, or at least reduce it.

    Its a Hope hub

  21. #21
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    I haven't found a way to get the noise to reduce. The only way to make it go away is to keep the slack out of the freehub, if that makes sense. Like always push forwards with your pedals instead of letting the pawls in the hub float between the engagement points.

  22. #22
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    no way, guys. i have hope, too. that is not normal. you need to service your hub. if you cant do it yourself i know from experience the usa hope folks in TX are very helpful.

    I had some bum bearings in my new proII that gave out after 4mos of riding and they had failed in such a way that i couldnt get the axle out to service on my own. they fixed me right up and even paid me back for my shipping cost!

  23. #23
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    If you have ever removed your freehub body from Pro 2 and re-assembled it, it is really easy to misplace the seal ring between the freehub and the hub itself, that will cause drag for sure.

    Talking from personal experience here.

  24. #24
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    it's not the hub dragging. I already checked that.

  25. #25
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    I honestly don't think we'll get the noise to stop. I've tried a bunch of things and nothing has really helped. it must be a combo of the hope hub construction, rim volume and the tube shaping/material that is reverberating and amplifying thenoise.

    i have almost the exact same setup, except my cassette only has 34 teeth. is your frame anodised too?

    My hub is also brand new and properly maintained.

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