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  1. #1
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    Chain skipping under load for 2nd cog

    My friend bought a new Raleigh Mt bike with a 9 speed cassette. When the bike is under load, or even without, in the 2nd cog from the largest cog, the chain does not stay in place. It keeps popping out of place like what happens when you buy a new chain and don't replace the cassette. The bike only has maybe 40 - 50 miles on it. So, everything looks new.

    I have tried the following:

    1) Adjusting the cable tension on the barrel of the dereailurer.
    2) Reinstall the derailurer cable.
    3) Checking the chain for wear. (It was a new bike, so I thought I would eliminate this possibility.)

    The only thing that I could possibly think of is if the hagar is misalligned. I don't have a tool for that, but this seems unlikely, as the only gear that is affected is the 2nd cog from the largest gear. (I dont know the # of teeth).

    I've tried micro adjsting the tension on the deraurer, but not effect. The shifter does not have an tension adjuster. Any help would be appreciated.

  2. #2
    Senior Member bikeman715's Avatar
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    it can be your hanger, with many gears there are on a bike it doesn't take much to be out of adjustment. have your friend take it back to the shop to have them check it during the free adjustment period.

  3. #3
    slow as I ever was Ex Pres's Avatar
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    Backing out the derailleur B-screw adjustment may help too

  4. #4
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    So, the B screw is also a micro adjust or tension?

    I always thought that they were the upper and lower limit setting for the derailurer.

  5. #5
    slow as I ever was Ex Pres's Avatar
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    Quote Originally Posted by gholt View Post
    So, the B screw is also a micro adjust or tension?

    I always thought that they were the upper and lower limit setting for the derailurer.
    72 special CNC ___________ 72 Frejus (ala Legnano) __73 Holdsworth Record
    78 Raleigh Professional_____ 80 Ranson_____________ 80 unknown French (SS)
    82 Peugeot PXN10_________83 Trek 620 (nee 600)____ 85 Gianni Motta
    85 Trek 560______________88 Guerciotti GLX
    90 Miele Gara_____________02 Casati Dardo (g/blue)__02 Casati Dardo (y/blk)
    03 Casati Dardo___________08 BF IRO (fixed)________10 Vassago Fisticuff (IGH)

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