Single Speed on a DH Rig??- Mtbr.com
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  1. #1
    dh mike
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    Single Speed on a DH Rig??

    I have had terrible luck with derailleurs and derailleur havgers on my dh rig

    went tthrough 5 hangers and 3 derailleurs

    they just cant take the punishment

    i was thinking about getting a road derailleur to thake up some of the chain slack but


    i think eliminating the derailleur the hangar and some excess chain will solve my problem for sure



    so has anyone tried it before

    thats a good ratio to use

    i was thinking 42 front witha either a 16 or 18 tooth out back

  2. #2
    Nouveau Retrogrouch SuperModerator
    Reputation: shiggy's Avatar
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    What about the suspension? It does have rear suspension I am guessing.
    Unless the swingarm pivots around the BB shell you have chain length growth which means you near a derailleur type tensioner.
    mtbtires.com
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  3. #3
    mtbr member
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    Check out...

    ...Canfield Brothers. They been running SS FR/DH bikes for a while now. In talking to Chris Canfield it seems that his brother Lance who you see in a lot of films has been running this set up for a while.

    Note, they have a unique driveline that helps accomodate this.

    As long as the gearing doesn't prohibit you from pedal kicking the front end up I think it would be a pretty cool idea. That, or get a Nicolai.

    Sean
    Professional Amateur

  4. #4
    Nat
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    Quote Originally Posted by DHmike661
    I have had terrible luck with derailleurs and derailleur havgers on my dh rig

    went tthrough 5 hangers and 3 derailleurs

    they just cant take the punishment

    i was thinking about getting a road derailleur to thake up some of the chain slack but


    i think eliminating the derailleur the hangar and some excess chain will solve my problem for sure



    so has anyone tried it before

    thats a good ratio to use

    i was thinking 42 front witha either a 16 or 18 tooth out back

    Would SS/DH be desireable? It seems like you'd either get spun out easily or be overgeared to set up for jumps and drops just right. Maybe a Rohloff would be a better choice?

  5. #5
    hispanic mechanic
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    As long as you can accomidate for "chain growth"...

    Like Shig said, your chain tension will most likely change with suspension travel. If you run a chain just long enough with a short cage road der., you'll rid yourself of a lot of problems. The other factor is, how much pedalling do you have on your courses? If it's like Moab rim/ Tour of the Canyonlands, SS will likely be competitve. Pedalling courses like Keystone? Not gonna be able to keep up.

    the los
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  6. #6
    banned
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    Quote Originally Posted by DHmike661
    I have had terrible luck with derailleurs and derailleur havgers on my dh rig

    went tthrough 5 hangers and 3 derailleurs

    they just cant take the punishment

    i was thinking about getting a road derailleur to thake up some of the chain slack but


    i think eliminating the derailleur the hangar and some excess chain will solve my problem for sure



    so has anyone tried it before

    thats a good ratio to use

    i was thinking 42 front witha either a 16 or 18 tooth out back
    I've had the same problem on my BigHit..there is one trail in particular that costs me around $75 every time I ride it, for new hanger and derailleur. I have opted to get a short cage Tiagra (cheap road der), and take up all of the slack, and hopefully that will tuck it up under there enough. I don't think the SS thing would work, on my setup anyways...

  7. #7
    Medium?
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    If you ran a Cove G-Spot

    frame, you could rig up a Rohloff 14 speed internal hub with no tensioner. The pivot around the BB gives it a constant chain length throughout its travel.

    It would be the sweet DH ticket, unless you need to go really big with some whacked out Karpiel 10" travel frame.

    <img src="https://shop1.afrobike.de/images/cove-gspot-front.jpg">

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