Boone Disc Fixed Cog- Mtbr.com
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  1. #1
    drev-il, not Dr. Evil!
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    Idea! Boone Disc Fixed Cog

    Brett Brown cnc'd this up for me. It's a 17T cog that bolts in place of a disc rotor, thereby rendering the hub a fixie. Let me know if you want more pics or info.
    Attached Images Attached Images

  2. #2
    ali'i hua
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    beautiful! my 21t standard cog should get here today or tomorrow.

    question: does this mean that you are now running your rear hub backwards?

  3. #3
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    Quote Originally Posted by Drevil
    Brett Brown cnc'd this up for me. It's a 17T cog that bolts in place of a disc rotor, thereby rendering the hub a fixie. Let me know if you want more pics or info.
    Looks great! Show the complete build.
    Also, what digi cam is that? Nice macro.
    Looking for...
    A PINK Chris King Headset... and disc hubs!

    As well as a Morati crankset!
    PLEASE Email me or PM me with any leads!!!

  4. #4
    Whiskey Tango Foxtrot
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    now THAT is sexy.

    while i couldn't see shelling out for the regular ti cog, THAT might be worth it. nice hardware!

  5. #5
    ali'i hua
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    Quote Originally Posted by eSSq
    while i couldn't see shelling out for the regular ti cog, THAT might be worth it. nice hardware!
    OT:
    hey chris- riding sunday?

  6. #6
    Fat Boy Deluxe
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    ... and if we just ...

    Quote Originally Posted by Drevil
    Brett Brown cnc'd this up for me. It's a 17T cog that bolts in place of a disc rotor, thereby rendering the hub a fixie. Let me know if you want more pics or info.
    Oh man! That is ssweet! Can't wait, mine should be here today or tomorrow, but the postman doesn't like to drop off the mail until late evening...oh the waiting...

    DT

  7. #7
    Faster Than Your TV!
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    Idea! Jeez...

    Quote Originally Posted by Drevil
    Brett Brown cnc'd this up for me. It's a 17T cog that bolts in place of a disc rotor, thereby rendering the hub a fixie. Let me know if you want more pics or info.
    you could a least wipe the snot off your index finger before you pose the piece, ya know!

    College pukes...I swear to gods...

    Nice-looking bauble...what did it set you back?
    "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailleur? We are getting soft...As for me, give me a fixed gear!'' -- Henri Desgrange, from an article in L'Equipe

    Wrench In the Gears

  8. #8
    Needed Less ~ Did More
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    Oh nice!

    Quote Originally Posted by Drevil
    Brett Brown cnc'd this up for me. It's a 17T cog that bolts in place of a disc rotor, thereby rendering the hub a fixie. Let me know if you want more pics or info.
    I was talking to the UK importer about getting a track cog made to fit a Miche "quick change" track cog carrier (see harris cyclery fixed gear page) as I have a Surly fixed / free hub!

    Worth giving him an e-mail?

    Later

    SSP
    "Put any one on one of these singlespeed bikes and they could not help but have fun"
    -
    Otis Guy talking about klunkers c1976

  9. #9
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    Very Nice, been waiting for one of these for a while. I have a question about the tooth profile though, with a Fixie you drive the cog in both directions (accelerating & braking), so I would expect a symetric tooth profile.

    Time to respace a front hub to 135mm & make a fixie-only wheel....

    Cheers,

    Tom

  10. #10
    Medium?
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    You ride backwards?

    You may apply force in both directions, but the chain is only ever going around in one direction; ie only "falling off" the teeth on one side.

  11. #11
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    That IS a cool idea.

    How's the chainline work out? Not much room for error I suspect.

  12. #12
    Witty McWitterson
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    Gawddam this Boone stuff is just downright fockin' sexy looking! I may have to splurge on a cog soon. What's cost, a buck a tooth or something like that? Maybe a ring to match would be cool...spendy, but dead sexy!

  13. #13
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    Quote Originally Posted by Fast Eddy - You ride backwards?
    You may apply force in both directions, but the chain is only ever going around in one direction; ie only "falling off" the teeth on one side.
    Not very good at riding backwards yet, but yes I do.

    I thought the teeth were cut that way for wear? The amount of force put on the teeth in the reverse direction is easily as much, so you will load up the back side of the tooth profile. The time spent there depends on the terrain, but usualy alot less.

    I have a Boone SS cog too (18t), and I actually prefer symetric teeth - it allows you to flip the cog for more run time, and I don't have a big issue with wear as I don't let my chain "stretch" too much - a worn chain is the main culprit for destroying cogs.

    However, this might just solve my problem with stripping threads on fixie hubs - cogs have about 1/2 the threads that freewheels have, and the low gearing for MTB'ing puts alot more force on those threads than the road/track riders.

    Cheers,

    Tom
    Last edited by itsdoable; 03-05-2004 at 10:12 AM.

  14. #14
    drev-il, not Dr. Evil!
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    A's for the Q's

    Cost: $2.50/tooth & S/H

    Slowsser: not usually. It's more of a bailout thing or when I'm in the mood to use it. Cold weather rendered my hub useless. I know there are solutions to the problem, but this is also nice to have. Now that it's gotten warm, I don't think I really need it on the hub. When it gets cold again, i.e. below freezing, I'll put it back on.

    Jacob: Old skool Olympus C-3030

    Singlespeedpunk: Worth giving Brett an e-mail? You decide. Very nice workmanship though.

    Fast Eddy & Itsdoable: I agree with Itsdoable about the teeth.

    I have a few issues with it that I want to discuss with Brett. Namely, tooth profile and clearance for the bigger heads of Torx disc rotor bolts. (Those are water bottle bolts on there now.) The next iteration should be fine.

    Chainline seems fine. Check out pics below.
    Attached Images Attached Images

  15. #15
    ali'i hua
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    that's sick!

    wheres my cog?

  16. #16
    WAWE
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    Quote Originally Posted by itsdoable
    Very Nice, been waiting for one of these for a while. I have a question about the tooth profile though, with a Fixie you drive the cog in both directions (accelerating & braking), so I would expect a symetric tooth profile.
    Probably a good idea.

    Time to respace a front hub to 135mm & make a fixie-only wheel....
    Now that's a great idea!

    Hmm... wonder if King would make a 135mm axle for their front hub.

  17. #17
    Rides Uphill Slow
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    Quote Originally Posted by Drevil
    Brett Brown cnc'd this up for me. It's a 17T cog that bolts in place of a disc rotor, thereby rendering the hub a fixie. Let me know if you want more pics or info.

    What's the website to order one of those cogs? I'd really like to "fix" my commuter. Thanks.

  18. #18
    mtbr member
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    Quote Originally Posted by The Hookler
    What's the website to order one of those cogs? I'd really like to "fix" my commuter. Thanks.
    http://www.booneti.com/cr/cr.html

  19. #19
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    Bring Brett Boone back to cycling!
    Creative Producer, Will of the Sun, Platform Pedal Shootout 1M+ views WoS

  20. #20
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    Just so everyone knows, Problem Solvers has been making these for a while... Cheaper than $2.50 per tooth too.

    https://problemsolversbike.com/produ...arrier_-_30911

  21. #21
    mtbr member
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    Velosolo does IS2000 cogs as well.

    Boone cogs are pure unobtainium nowadays.
    Ride more!

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