Crank/BB problem

Discussion in 'Observed Trials Discussion' started by cck, Mar 8, 2004.

  1. cck

    cck Member

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    i recently noticed that when spinning the crank (tryall isis on fsa plat. pro) that the chainline moves back and forth. upon further inspection i realized that the crank/freewheel was moving back and forth as if it was warped. i was wondering if anyone else has experienced this. i'm not sure if i have a warped bb spindel or warped (or misalligned) isis threads inside the crank. thanks for any info
     
  2. Ed Gildea

    Ed Gildea New Member

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    probably just your crank arm.. remeber, nothing is perfict.. :)
     

  3. Pancho

    Pancho Member

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    My echo cranks started doing the exact same thing three days after I put them on. It's just bent on mine, probably from doing four 9 foot drops in two days with no style.
     
  4. cck

    cck Member

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    pancho, what did you do after that? can you get em warrantied? mine seem to have come like that because they are practically brand new. or do i have to live with it?
     
  5. AndyT

    AndyT New Member

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    Live with it, i've never had a front freehweel set up that didn't do that..
     
  6. cck

    cck Member

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    but i want my bike to be perfect :wtc: :( :wtc: :wtc: :wtc: :(
     
  7. tomacropod

    tomacropod Rum Pig

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    stop riding it then

    - Joel
     
  8. Faction Bike

    Faction Bike Guest

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    Yo Cam, that is just the nature of freewheels. They have the slight wobble action to them. It's not your cranks or bottom bracket or brain playing tricks on you. It just due to the fact that the driver body (inside of the freewheel) rests at a slight angle due to the threads of the cranks, when compared with the bash ring. When the teeth rotate around the driver body that angle causes the teeth to translate slightly in the z plane, giving you a "wobble".
     
  9. AgrAde

    AgrAde From your head to your fists

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    yep, mine does so to.

    speaking of freewheels, my echo one skipped three times tonight and is making bad sounds. i have only had it for a week.
     
  10. Zyzzyx

    Zyzzyx Guest

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    speaking of freewheels, my new White Industries trials FW is cranking along with zero problems. have had it for almost two weeks. (well, on the bike anyway)
     
  11. trialsbug

    trialsbug New Member

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    My ACS wobbled, but the WI that I installed at Motorama doesn't wobble at all.
     
  12. arny p

    arny p Guest

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    acs freewheel need to have thread lock put onto them to keep them tight
     
  13. Faction Bike

    Faction Bike Guest

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    the wobble isn't really a wobble. It just that all freewheel's rest at a super slight angle when screwed on the cranks. When the cranks rotate, the "wobble" look is due to this slight angle. If you don't have the wobble those are some crazy threads on your cranks.