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Thread: Single Speed DH

  1. #16
    Grasshopper
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    Some interesting stuff in there.

    Looks like a lot (maybe only a few) of people are thinking along the same lines as me.

    Got rough plans in my desk drawer for a single pivot, single speed, low and slack 6" DH rig made form skinny steel tubes.

    Just need a big shed and to learn how to weld!

  2. #17
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    Yeh, single speed DH pwns

    I did it to my bike after relising I never changed gears while riding and it makes it so much quieter
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  3. #18
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    Quote Originally Posted by An0maly View Post
    Yeh, single speed DH pwns

    I did it to my bike after relising I never changed gears while riding and it makes it so much quieter
    Bike looks good! But what do 'pwns' and 'relising' mean?

  4. #19
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    Quote Originally Posted by phutphutend View Post
    Bike looks good! But what do 'pwns' and 'relising' mean?
    Because sarcasm is hard to detect on the internet I don't know whether you are pointing out my spelling or asking the question seriously? If you are in fact asking seriously then 'pwns' means owns, as in it owns. Slang

    'relising' was me spelling realising wrong (and in NZ we spell it with a 's')

  5. #20
    Chimp 888fall's Avatar
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    my DH SS is all done
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  6. #21
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    Hey Phut, I think you are awesome, dude. I've been around a few forums trying to find somone like you who actually has some experience with building and riding a top-end SS MTB, and I have only ever been met by rudeness and closed doors.

    I'm wanting to build up a little street-toy for myself, and am going to have a top end full-sus MTB 26" frame, with perhaps 24" wheels for that added manoervrbility, so I can fling it around like a BMX.

    What's an E13 chain device? Is that the company name? I must google it....

  7. #22
    Turbo Monkey skatetokil's Avatar
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    There are many different companies that make chainguides. E13 is just the most popular.

  8. #23
    Monkey
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    Does anyone have any experience with this?
    http://www.pricepoint.com/detail/175...-Tensioner.htm

    The whole appeal of switching to ss is to clean up the rear end but I don't see too much of a difference if I still have to run a spring loaded tensioner back there. I've got a Sunday so I think the chainstay wouldn't allow me to set it up like Phut's

  9. #24
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    Lollapalooza,

    No experience of that Yes tensioner but not sure if it would work at the same time as a normal chainguide. On a DH bike you still need a chainguide to run SS.

    I've changed my setup a bit recently. I bought a Turner DHR and the old device didn't fit. So I bought a Rohloff tensioner. Yup, this still sitas in the same place as a regular mech but it's way stronger, shorted and stiffer. It's had a few hits and still works fine. Also, it doesn't rattle around like a normal mech so my bike is really quiet.

    About 2 years now SS, and can't think pf any reason to go back.

  10. #25
    Monkey
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    Haha sorry I should have clarified: I'd be using it in place of a lower roller with the bashguard and upper part of the guide I have on it now. The Rohloff one does look pretty tight and tucked away though. Any idea as to how it compares to the Yess one? It would be interesting to see a list of how much chain growth/tug common dh bikes have to see how much 'travel' the chain tensioner would need to have.
    Last edited by Lollapalooza; 08-15-2010 at 11:48 AM.

  11. #26
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    Only have experience of the Rohloff I afraid.

    Try Linkage the suspension analysis software. This will tell you the chain growth for nearly all frames.

  12. #27
    Monkey
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    It's not too accurate but i used http://media.photobucket.com/image/iron%20horse%20sunday%20specs/CK_123/2007SundayNEWI.jpg to do a little mock up in cad and it the chain grows by about 1.5". I think I might just try the bottom bracket mounted one paired with 2/3rds of a chainguide and cycle through the suspension and see if it still works.

    Edit: Eh nevermind I don't think it would really work. Oh well I'm heading into the garage to see if I can come up with something
    Last edited by Lollapalooza; 08-15-2010 at 04:00 PM.

  13. #28
    Judge Dread
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    SS on a DH bike is definately different and fun. I set up my old Sinister R9 as a SS with a yess chain tensioner and because there was very little chain growth it worked great.

    Very smooth and quiet and great for non-race riding. I raced SS at Massanutten and it was a disaster for me. I just couldn't carry enough speed on the pedal sections and was way off the pace. I did take out a photographer in the first barrell turn in practice though. He was not looking and turned his back to me to walk up the hill just as I was entering the turn, the bike was so quiet he didn't hear me coming and I rode right over him.

    I love riding SS dh but just not for racing. However, Ninja Bob has been racing SS at Snowshoe the last two seasons and absolutely kills it... but then again he is a ninja!!!

  14. #29
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    Hi all...reading all this thread inspires me to build a SS DH rig. After converting my old and dusty SC Blur to a SS SC BLur...it was fun. swapping it with narrow 27inch to 29inch bars sure helps me ride long xc and bombing DH sections. Then it occurs to me to convert my DH rig to SS aswell. So i did it with a SS tensioner (don't know what brand it was) with 18T cog at the back...It was the best decision i've ever made....the SS Norco A-Line Park Edition is the only DH bike in my country and i think i'm the only mad enough to do this. Alot of eyes are watching me when i push up the trails and all sorts of questions i get but i just don't care...its fun, i can have a peace of mind when im pedalling. surely the climbing part is a minus but still i can pedal up there.

    Now im convinced....no need all those 9 or 10 speed at the rear...just 1 would do....thanks guys for all your comments and i really enjoy reading it and you guys inspired me....

  15. #30
    Chimp
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    Here is my SS DH/FR bike. Iron Horse 7 Point with a Yess tensioner. I love it.
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