eagle shifting/noise problems

Discussion in 'Shop Talk' started by sir crashalot, Dec 11, 2017.

  1. sir crashalot

    sir crashalot Well-Known Member

    Location:
    laguna beach
    Name:
    gary fishman
    Current Bike:
    2018 banshee rune
    1. Ghetto eagle, actually. Recently installed sunrace 11-50 11 speed cassette, gx eagle derailleur on a new der hanger, gx 11 speed shifter, with existing 30t mrp chainring.
      it doesn't want to upshift from the 42t to the 36t, but what really driving me nuts is theres a rumbling sound in the 3 largest cogs, almost like every chain roller is rubbing a tooth somewhere, but only under max crank load when climbing steep, cant reproduce it in the stand. b-tension is set according to the gap spacing tool that came with it and I followd srams instructions regarding chain length. Except for that one upshift it shifts fine everywhere else. ive never had a problem setting up a rear derailleur in 12 years of riding/working on my bike. Any ideas anyone? Could it be the chainline? the chainring is in the "middle" 104 bcd setting on an older shimano xt triple crankset, about 51 mm chainline which seems to line up with the 5 smallest cog . Thanks.
     
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  2. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J
    Current Bike:
    SC Chameleon SS
    Add a link and see if that makes a difference.
     
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  3. sir crashalot

    sir crashalot Well-Known Member

    Location:
    laguna beach
    Name:
    gary fishman
    Current Bike:
    2018 banshee rune
    added a pic of it in big cog

    IMG_2031.JPG
     
  4. SnakeCharmer

    SnakeCharmer iMTB Addict

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Snake"
    Current Bike:
    Salsa/Trek/Kona
    It could be chain line related to some extent. I am using Sunrace cassettes on both of my mountain bikes. I will be the first to admit that they are not quite cut as nicely as Shimano and Sram. They do run a little rough, comparatively. I have been through a few sets. I have noticed noise on one or two of them but as the teeth wore into the chain, the noise ceased. All of this said, I am satisified with Sunrace overall and I will continue to use them when the time comes replace another cassette. Their price is attractive and so is the gearing ranges in 10 speed they offer (not available in Shimano 10 speed).

    My suggestion is to super clean your chain and re-lube it (or replace it if it's not new). Sticky links can cause your issue.
     
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  5. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J
    Current Bike:
    SC Chameleon SS

    Oooops.....missed this part. Generally that rumbling is the b-tension set too close to the cog. They have it listed as 15mm for 11/12 spd.
     
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  6. sir crashalot

    sir crashalot Well-Known Member

    Location:
    laguna beach
    Name:
    gary fishman
    Current Bike:
    2018 banshee rune
    J, B tension is set perfect using SRAMs tool. Snake, this is a different sound than the metallic sound of chain grinding against the next cog, it does do that a little too but that doesn’t bother me. And it’s a brand new chain. Other bike has sunrace 11-46 cassette/gx shifter with ring on the 64 bcd slot and it’s dead quiet.
     
  7. sir crashalot

    sir crashalot Well-Known Member

    Location:
    laguna beach
    Name:
    gary fishman
    Current Bike:
    2018 banshee rune
    Guys see my edit above I added a pic. Chain look too tight? I followed SRAMs instructions for eagle chain length (compress suspension, wrap around big cog and add 2 links past overlap)
     
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  8. SnakeCharmer

    SnakeCharmer iMTB Addict

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Snake"
    Current Bike:
    Salsa/Trek/Kona
    I wasn't referring to the sound, I was referring to the fact that it doesn't want to shift, where sticky chain links are concerned. Hope you get it sorted out and I hope you will share what it was that is causing the issues afterward.

    EDIT: After looking at the picture, the RD looks stretched out quite a bit in that gearing combo. Does the suspension stretch it even further as it moves through it's travel?
     
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  9. sir crashalot

    sir crashalot Well-Known Member

    Location:
    laguna beach
    Name:
    gary fishman
    Current Bike:
    2018 banshee rune
    yes, a bit but doesnt bind at full travel. I did the chain length when compressed like i always have, followed srams eagle instructions and added 2 links past overlap. Think im gonna try j's idea of adding another (has to be a pair actually i suppose) link.
     
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  10. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J
    Current Bike:
    SC Chameleon SS
    You can't get it to replicate in the stand because your are not sagging into the travel, thus the chain length isn't growing.
     
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  11. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J
    Current Bike:
    SC Chameleon SS
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  12. sir crashalot

    sir crashalot Well-Known Member

    Location:
    laguna beach
    Name:
    gary fishman
    Current Bike:
    2018 banshee rune
    Here it is in smallest cog:

    C2F0DEB0-052E-4235-AA3F-B2296EEDE697.jpeg
     
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  13. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J
    Current Bike:
    SC Chameleon SS
    Add a link
     
  14. SnakeCharmer

    SnakeCharmer iMTB Addict

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Snake"
    Current Bike:
    Salsa/Trek/Kona
    It looks like it will lay over on upper RD pulley if another link (actually 2 links) are added.

    Darn pie plates, LOL!
     
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  15. Redman

    Redman Well-Known Member

    Location:
    Cypress, Ca
    Name:
    Kevin
    Current Bike:
    Santa Cruz Nomad CC 27.5
    Just a guess... rumbling sound is your chain skipping on upper pulley. Either because b tension to far and or chain is short. ????:thumbsup::thumbsdown::stop::unsure::(
     
  16. sir crashalot

    sir crashalot Well-Known Member

    Location:
    laguna beach
    Name:
    gary fishman
    Current Bike:
    2018 banshee rune
    Good point! When pedaling in that gear on flat not under load, its much quieter.
     
  17. sir crashalot

    sir crashalot Well-Known Member

    Location:
    laguna beach
    Name:
    gary fishman
    Current Bike:
    2018 banshee rune
    AFter adding 2 links

    105960AE-1D66-4E6D-8DCC-53AF464707F9.jpeg
     
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  18. sir crashalot

    sir crashalot Well-Known Member

    Location:
    laguna beach
    Name:
    gary fishman
    Current Bike:
    2018 banshee rune
  19. tbarnesarc

    tbarnesarc Well-Known Member

    Location:
    Laguna Beach
    Name:
    Taylor
    Current Bike:
    2016 Giant Reign
    Chain doesn't look too short in original post imop but that obviously depends on the suspension design. If the indexing is correct I would guess a chainline isssue?
     
  20. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J
    Current Bike:
    SC Chameleon SS

    Does the chain rub the upper pulley when you settle into the sag? If not, you should be fine.
     
  21. sir crashalot

    sir crashalot Well-Known Member

    Location:
    laguna beach
    Name:
    gary fishman
    Current Bike:
    2018 banshee rune
    Pie plate>motor!
     
  22. Daddy Dirtbag

    Daddy Dirtbag Member

    Location:
    Castaic
    Name:
    Jeff Johansen
    Current Bike:
    2016 Trek Stache 9 29+
    IIRC, the Eagle derailleur B-screw is supposed to be adjusted so the jockey wheel is about 13 - 15mm away from the large cog, which is kind of counter-intuitive to conventional wisdom that you should usually try to tuck the derailleur up as close as you can to the cassette. I would try that before removing the extra link(s) that were recently added because that might also make it so the chain doesn't rub on itself when in the smallest cog.
     
  23. SnakeCharmer

    SnakeCharmer iMTB Addict

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Snake"
    Current Bike:
    Salsa/Trek/Kona
    Obviously, that gearing combo is not one that we would generally be in while rolling through the rough stuff but if it is, the chain is going to slap all over the upper RD pulley area.
     
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  24. sir crashalot

    sir crashalot Well-Known Member

    Location:
    laguna beach
    Name:
    gary fishman
    Current Bike:
    2018 banshee rune
    Not even close. Rode to work today, so far so good. There’s a steep climb on the way home for further testing. Thanks j!
    So wierd that SRAMs directions would steer me wrong on chain length. Maybe I miscounted links or something.
     
  25. sir crashalot

    sir crashalot Well-Known Member

    Location:
    laguna beach
    Name:
    gary fishman
    Current Bike:
    2018 banshee rune
    b screw is adjusted to spec.
     
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  26. CalEpic

    CalEpic Member

    Name:
    Craig
    The clutch on older 11-speed SRAM rear derailleurs can be a little finicky in lower gears under load and can make some noise, but it's usually more of a clunk/creak. May not be what your issue is. I would also think that since the GX is a newer generation that they would have this problem fixed by now. If you've eliminated other causes, there is a procedure to lube the clutch that Google knows about.
     
  27. sir crashalot

    sir crashalot Well-Known Member

    Location:
    laguna beach
    Name:
    gary fishman
    Current Bike:
    2018 banshee rune
    Added 2 links, cranked up a steep hill in lowest gear after work and the rumbling seems gone. @mtnbikej for the win. Thanks!
     
  28. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J
    Current Bike:
    SC Chameleon SS

    Woohoo......SS guy for the geared win. :thumbsup:

    Glad it got sorted out. :thumbsup:
     
  29. Luis

    Luis iMTB Rockstah

    Location:
    Sylmar
    Name:
    Luis
    Current Bike:
    Big Black 29er
    I would have bought a new bike by now... :whistling:
     
  30. sir crashalot

    sir crashalot Well-Known Member

    Location:
    laguna beach
    Name:
    gary fishman
    Current Bike:
    2018 banshee rune
    Ha, thats a 2011 frame with the new drivetrain.
     
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