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  1. #1
    mtbr member
    Join Date
    Dec 2004

    Gearing, chain & cog questions

    I am trying the single speed thing with my 29er Voodoo Dambala.

    I am using a Shimano cassette with spacers and a 21 tooth rear hyperglide cog, 38 tooth front ring (no pins or ramps) and a nine speed chain.
    Last night I went for a ride and had the chain pop off twice. I tightened it some and got it to stay on the rest of the ride.

    Should I go to a BMX rear cog and a wider chain? I am a little tentative now in standing and grinding out a climb for fear of the chain coming off.

    I like using the hyperglide cogs because I have about 20 to 30 hanging on my wall. Any success stories using hyperglide cogs?

    Thanks in advance for your help. BTW I did read the FAQ section.

  2. #2
    mtbr member
    Join Date
    Nov 2006
    I tried the same thing and it just didn't work. I think that everyone else will tell you the same thing. I bit the bullet and built a dedicated SS wheel with a freewheel and haven't regretted it, but the cheaper option would be for you just to get a new SS cog - I think there are plenty out there that will still let you use a narrow chain.

  3. #3
    mtbr member
    Reputation: crowmag's Avatar
    Join Date
    Jun 2007
    The Shimano cogs are to thin over 19t they will flex under load with a SS get a Surly cog

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