Chain SLAP! :(

Discussion in 'Shop Talk' started by SnakeCharmer, Mar 5, 2019.

  1. SnakeCharmer

    SnakeCharmer iMTB Addict

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Snake"
    Current Bike:
    Vassago/Trek
    Chain slap is extremely annoying. It's happening on my new bike when I roll through chatter/tech at speed. It is even happening when the chain is on the pie plate.

    I was thinking that perhaps the RD clutch bearing was wasted but it has the same tension as those on new bikes at my LBS.

    I've been doing minor adjustments with rebound on the rear shock, too. No help.

    So, is my chain too long? (see pics) Top pic on 10 tooth, bottom pic on pie plate.

    *When the rear suspension compresses, it stretches the RD noticeably.

    IMG_7290.JPG

    IMG_7291.JPG
     
  2. DangerDirtyD

    DangerDirtyD iMTB Rockstah

    Location:
    CA
    Name:
    Chicken Nugget
    Current Bike:
    2013 Trek Slash 9
    You’re riding too fast for the Trek. Slow down and stick to the buff.

    Actually I was gonna suggest checking the tension on the derailleur, but alas you did and it doesn’t seem to be the culprit. Maybe it’s just the location of the chain stay..? In the mean time, embalm your drive-side swigarm with this: https://www.amazon.com/dp/B001B1AP3O/?tag=imtbtrails-20
    I’m not sure if you could remove a link or two without seeing the swing arm fully compressed with the chain on the pie plate.
     
  3. Voodoo Tom

    Voodoo Tom MTB Addict

    Location:
    Castaic
    Name:
    Tom Kokkinakis
    Current Bike:
    Mango one, blue one, black one
    Chain length looks good to me. Eagle seems to like a long chain. I don’t see a rubber(or any) chain stay protector though?
     
  4. SnakeCharmer

    SnakeCharmer iMTB Addict

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Snake"
    Current Bike:
    Vassago/Trek
    There is an OEM rubberized chain stay protector on top of the chain stay but perhaps I should consider more thoroughly wrapping it in a more absorbent cushioned material. The odd thing is this seems to have just recently started. :mad:

    Thanks guys!
     
  5. mike

    mike iMTB Hooligan

    Location:
    Western US
    Name:
    Mike O
    Current Bike:
    GG Smash
    Slap sock time.
     
  6. Cornholio

    Cornholio iMTB Rockstah

    Location:
    Salton Sea
    Name:
    Carol
    Electrical tape, old tube, tennis grip, duct tape, buy one, your pick!
     
  7. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J M
    Current Bike:
    SC Chameleon SS, SC Hightower
    Yup, that small stock chain protector ain't doing squat.

    Some bikes are just more susceptible than others.
     
  8. Runs with Scissors

    Runs with Scissors iMTB Hooligan

    Location:
    West Anaheim
    Name:
    Mark Whitaker
    Current Bike:
    2015 Giant XTC Advanced 1 29er
    Obviously you need a new bike.
     
  9. SnakeCharmer

    SnakeCharmer iMTB Addict

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Snake"
    Current Bike:
    Vassago/Trek
    I ordered a large Lizardskins Neoprene chainstay protector. :)
     
  10. herzalot

    herzalot iMTB Hooligan

    Location:
    Laguna Beach
    Name:
    Chris
    Current Bike:
    '15 Intense Tracer 275c DVOish
    Stop riding bumpy trails.
     
  11. SnakeCharmer

    SnakeCharmer iMTB Addict

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Snake"
    Current Bike:
    Vassago/Trek
    All trails have bumps, but not all bumps are not noticeable until you hit them at speed. :cool:
     
  12. UPSed

    UPSed iMTB Hooligan

    Location:
    Simi Valley
    Name:
    Ed Bottorff
    Current Bike:
    Niner Jet 9 RDO
    And you have to be on your bike to do that....:whistling:
     
  13. mike

    mike iMTB Hooligan

    Location:
    Western US
    Name:
    Mike O
    Current Bike:
    GG Smash
    Dumb thought... Some ders have an on-off switch for the clutch. (Don't think that GX does.)

    I had a bit of slap on my Czar. A larger front chainring and removing a chain link helped minimize it.
     
  14. Mikie

    Mikie Admin/iMTB Hooligan

    Location:
    Lebec, California
    Name:
    Mikie Watson
    Current Bike:
    Santa Cruz Hightower/Yeti 5C
    I have absolutely nothing sarcastic or contributing to say... :gotnothing:
    Carry on!
     
  15. -ROCKY-

    -ROCKY- Well-Known Member

    Location:
    Lakewood, CA
    Name:
    Rocky
    Now you're just yanking the guys chain!!!
    :p
     
  16. Luis

    Luis iMTB Rockstah

    Location:
    Sylmar
    Name:
    Luis
    Current Bike:
    Big Black 29er
    Ride faster, the wind rushing past your ears will be the only sound you hear :p
     
  17. CBone

    CBone Well-Known Member

    Location:
    Antelope Valley
    Name:
    Tucker
    Current Bike:
    Intense Primer
  18. knucklebuster

    knucklebuster Well-Known Member

    Location:
    92691
    Name:
    Dave
    Current Bike:
    Guerrilla Gravity Megatrail
    There's something not right if the chain slaps when in the big cog and you have a proper functioning clutch der and the chain is the right length, especially if it wasn't doing it before and just started now. I know nothing about SRAM ders (yet :) ) but Shimano clutches can require adjustment every now and then.
     
    Danmtchl, Mikie, SnakeCharmer and 4 others like this.
  19. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J M
    Current Bike:
    SC Chameleon SS, SC Hightower

    SRAM 1x derailluers are not adjustable(in theory, if you ask SRAM). You can remove the dust cap and tighten them.

    At least they used to be.
     
  20. CBone

    CBone Well-Known Member

    Location:
    Antelope Valley
    Name:
    Tucker
    Current Bike:
    Intense Primer
    Sorry about the language.
     
    Danmtchl, Mikie and mike like this.
  21. SnakeCharmer

    SnakeCharmer iMTB Addict

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Snake"
    Current Bike:
    Vassago/Trek
    I've stopped several times mid-ride recently to see what was causing the noise. I can't find anything loose so I assume that it is chain slap. Of course, it's loudest when the chain is sitting on a faster gears. It sounds like a loose cassette or a loose hub or a loose axle to me but none of those are loose at all.
     
  22. Voodoo Tom

    Voodoo Tom MTB Addict

    Location:
    Castaic
    Name:
    Tom Kokkinakis
    Current Bike:
    Mango one, blue one, black one
    Internal routed cables?
     
  23. SnakeCharmer

    SnakeCharmer iMTB Addict

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Snake"
    Current Bike:
    Vassago/Trek
    Ah yes, it could be the internally routed RD cable. I did wiggle the cable housing to see if it is loose and it's quite tight.

    The sound is clearly far back on the bike.

    The chainstay wrap/guard arrives on Monday. I will ride the same route again after it has been installed. We shall see...
     
    Danmtchl, Mikie, mike and 1 other person like this.
  24. herzalot

    herzalot iMTB Hooligan

    Location:
    Laguna Beach
    Name:
    Chris
    Current Bike:
    '15 Intense Tracer 275c DVOish
    External speakers and loud music seems like a reasonable solution.
     
    Danmtchl, SnakeCharmer, Mikie and 6 others like this.
  25. UPSed

    UPSed iMTB Hooligan

    Location:
    Simi Valley
    Name:
    Ed Bottorff
    Current Bike:
    Niner Jet 9 RDO
    See @scottay for recommendations.
     
  26. SnakeCharmer

    SnakeCharmer iMTB Addict

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Snake"
    Current Bike:
    Vassago/Trek
    I shank riders and hikers who pollute the beautiful sounds of nature and silence with their musical noise.
     
    Danmtchl, Mikie, scottay and 4 others like this.
  27. Sidewalk

    Sidewalk Well-Known Member

    Location:
    The road is where I call home
    Name:
    Josh
    Current Bike:
    N+1
    I doubt it is chain slap if it is happening in the big cogs.

    Sram doesn't have that feature.
     
    DangerDirtyD, Danmtchl, Mikie and 3 others like this.
  28. scottay

    scottay Well-Known Member

    Location:
    Gods Country
    Name:
    Scottay
    Some bikes are just noisy....i've zip tied my cables everywhere and to each other and ran no ice in my waterbottle just trying to pinpoint noise.
    .
    Add Kraco 6x9 for instant repair!
    .
    radio.jpg
     
  29. Runs with Scissors

    Runs with Scissors iMTB Hooligan

    Location:
    West Anaheim
    Name:
    Mark Whitaker
    Current Bike:
    2015 Giant XTC Advanced 1 29er
    Just don't turn it in on the trail. :eek:
     
  30. BonsaiNut

    BonsaiNut Well-Known Member

    Location:
    Laguna Hills
    Name:
    Greg P
    Current Bike:
    XTR 29er (aka Frankenstein)
    If you are interested... 6:39 starts the section on measuring the chain.

     
Loading...
Similar Threads - Chain SLAP
  1. buggravy
    Replies:
    23
    Views:
    224
  2. Dirtrider....
    Replies:
    39
    Views:
    639
  3. blixet
    Replies:
    4
    Views:
    285
  4. rossage
    Replies:
    44
    Views:
    1,698
  5. rossage
    Replies:
    53
    Views:
    2,782