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  1. #1
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    3 bolts on a Fixed Cog?

    Im doing the DIY bolt on fixed cog. the cog i am using is from a cassette and it already has 3 holes that line up with the disk bolts perfectly. the other three are off and are going to be a real pain to drill out correctly. Do you think i can get away with using just the 3 that already fit?

  2. #2
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    I'd say no.

    Nico Vouilloz raced with 4 bolts on one of his disc brakes. 4 out of six.
    I'm sure if he thought he could've gotten away with 3 he would have.
    While the designed strength requirements are inherently overbuilt, the interface was never intended for use as a drive gear, only as a brake mounting point (one of 2).
    You might be fine or you might not, but my 2 cents is this- if it's the only gear AND one of your brakes all in one? don't shortchange how it's attached to the rest of your ride.
    If steel is real then aluminium is supercallafragiliniun!

  3. #3
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    i think your biggest problem is going to be using a cassette cog. ramps and short teeth for a fixie is not a great idea. Get a tomicog.

  4. #4
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    byknuts and ISAR have said it all... Don't do it. I ride fixed, and I only use dedicated, non-ramped, high-toothed cogs installed in the correct way (i.e. either using six bolts or using the traditional right-hand thread+lockring mechanism).

  5. #5
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    ok... thats sort of what i was thinking. i went ahead and ordered me up the Tomicog. pretty psyched. fixed gear mountain biking here i come.

  6. #6
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    You'll love it... or not. Either way, it's a pretty intense experience Make sure you post your findings!

  7. #7
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    This would have been the quickest way to answer OP's question..with another question..would you run a rotor with 3 bolts? Or would you use 3 lug nuts on your 6 lug truck wheels? I think not sir. I think not.
    Mountain bikers who don't road ride have no legs...
    Road riders who don't mountain bike have no soul...

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