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Thread: Chainless bikes

  1. #1
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    Chainless bikes

    while recently flying i was looking at one of those SKYMALL catologs they give you on the airplane and they showed a chainless bike created by "dynamic cycles".
    The bikes they have put this drivetrain on are pretty lame, but what i have been wondering is if this technology could be put on a freeriding bike, there are a lot of problems with the current chain set-up; de-railers getting brocken, chain falling off etc.
    Would there be anyway you could get different gears on a drive system like this?

    here is the website
    https://www.dynamicbicycles.com

    here is a picture of the drive shaft
    <img src="https://www.dynamicbicycles.com/images/parts/shaft-drive-gear.jpg">

    and this is a animation they created
    https://www.dynamicbicycles.com/Anim...amicpopup.html
    Last edited by leddder; 02-28-2006 at 06:06 PM.
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  2. #2
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    Internally geared hub?

  3. #3
    kona-tize me captain
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    its a cool idea, but i dont think the chain needs to be replaced. its a proven way to power a drivetrain. kinda liewk the sayign "if it aint broke dont fix it" just my 2 cents
    Looking for a 7.87 x 2.25mm shock, any brand any age that runs well!! cheap would be appreciated!

  4. #4
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    Quote Originally Posted by leddder
    while recently flying i was looking at one of those SKYMALL catologs they give you on the airplane and they showed a chainless bike created by "dynamic cycles".
    The bikes they have put this drivetrain on are pretty lame, but what i have been wondering is if this technology could be put on a freeriding bike, there are a lot of problems with the current chain set-up; de-railers getting brocken, chain falling off etc.
    Would there be anyway you could get different gears on a drive system like this?

    here is the website
    https://www.dynamicbicycles.com

    here is a picture of the drive shaft
    <img src="https://www.dynamicbicycles.com/images/parts/shaft-drive-gear.jpg">

    and this is a animation they created
    https://www.dynamicbicycles.com/Anim...amicpopup.html

    that system will never be as efficient, provide the same amount of torque AND be as light as a chain/cog setup.....

  5. #5
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    i vaguely remember reading something about a 2 wheel drive mtb that had power in the front wheel... anybody know anything about that?

  6. #6
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    haha, the animation shows the rear hub turnign backwards... a chain drive system is one of the most efficent methods of power transfer. The whole derailleur systems leaves something to be desired, but like others have mentioned, there is nothing wrong with chains.

  7. #7
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    Quote Originally Posted by flatulentfox
    haha, the animation shows the rear hub turnign backwards... a chain drive system is one of the most efficent methods of power transfer. The whole derailleur systems leaves something to be desired, but like others have mentioned, there is nothing wrong with chains.
    i definantly didnt see anything turning backwards

  8. #8
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    Quote Originally Posted by thebikedoctor33
    i vaguely remember reading something about a 2 wheel drive mtb that had power in the front wheel... anybody know anything about that?

    I tried one once. Fun as heck. But HEAVY.

    http://www.cyclesg.com/jp/awd/classic.html
    Last edited by shabbasuraj; 02-28-2006 at 06:59 PM.

  9. #9
    kona-tize me captain
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    Quote Originally Posted by thebikedoctor33
    i vaguely remember reading something about a 2 wheel drive mtb that had power in the front wheel... anybody know anything about that?

    jeep makes one and i think mongoose had one. i saw it on the discovery channel, dotn really remember what the topic of the show was though. its cool in soem way but to me its njust more parts to care about and break
    Looking for a 7.87 x 2.25mm shock, any brand any age that runs well!! cheap would be appreciated!

  10. #10
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    Christini is the name of the company with 2 wheel drive.
    Here's the link...

    http://www.christini.com/tech-about.php
    Quote Originally Posted by thebikedoctor33
    i vaguely remember reading something about a 2 wheel drive mtb that had power in the front wheel... anybody know anything about that?

  11. #11
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    all bmw motorcycles use drive shafts like that. so do honda goldwings. i don't see why you wouldn't be able to put one on a fr/dh rig...
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  12. #12
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    Quote Originally Posted by flatulentfox
    haha, the animation shows the rear hub turnign backwards... a chain drive system is one of the most efficent methods of power transfer. The whole derailleur systems leaves something to be desired, but like others have mentioned, there is nothing wrong with chains.
    I guess there really isnt anything wrong with chains, but there is still a problem with de-railers. I have gone through numerous derailer hangers + a few derailers. I havent really seen any affordable way to fix the derailer problem.

    I can understand this system being heavy now, but couldnt you slim it down with some lighter weight metals, i am sure less time and energy has gone into looking into this system then has gone into the current system.

    Just throwing out some ideas.
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  13. #13
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    but you bike would have to pivot around the bb and have no chain growth...
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    Quote Originally Posted by JBsoxB
    does it still qualify as a mountainbike?
    Quote Originally Posted by kidwoo
    I've beat beer cans on my limp pee pee.

  14. #14
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    Quote Originally Posted by scabrider
    but you bike would have to pivot around the bb and have no chain growth...
    I guess i forgot about adding in rear suspension, this design might only work on a hardtail or a small travel full suspension. I doubt a drivetrain could handel 7+ inches of rear travel.
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  15. #15
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    Quote Originally Posted by scabrider
    all bmw motorcycles use drive shafts like that. so do honda goldwings. i don't see why you wouldn't be able to put one on a fr/dh rig...
    The key here is BMW and Goldwing. Neither one is a sportbike or MX application. If they had a better drive system than chain it would be on a GP bike.
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  16. #16
    I like air!
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    didnt Ferrari make a 2 wheel drive bike a few years back too.

  17. #17
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    Quote Originally Posted by scabrider
    but you bike would have to pivot around the bb and have no chain growth...
    You could build it with a sliding yoke like an automobile driveshaft to account for suspension movement.

  18. #18
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    Quote Originally Posted by misctwo
    that system will never be as efficient, provide the same amount of torque AND be as light as a chain/cog setup.....
    Their website claims 99$ efficiency...I'd have to pedal one to belive that

  19. #19
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    I own a chainless bike

    Hi MTB'ers,

    I know there are a lot of pros and cons to going chainless, but why not
    ask *me* about what it's like to ride, using a drive shaft.....Instead
    of wondering?

    My Fuel 80 and my Specialized Enduro are collecting dust since
    my Dynamic Outback arrived![ATTACH]193908

    Happy trails.

    ShaftMan
    Attached Images Attached Images
    Last edited by ShaftMan; 09-06-2006 at 09:03 AM.

  20. #20
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    Quote Originally Posted by ShaftMan
    Hi MTB'ers,

    I know there are a lot of pros and cons to going chainless, but why not
    ask *me* about what it's like to ride, using a drive shaft.....Instead
    of wondering?

    My Fuel 80 and my Specialized Enduro are collecting dust since
    my Dynamic Outback arrived![ATTACH]193908

    Happy trails.

    ShaftMan
    sounds like you work for Dynamic.

    Motorcycles have done shaft drives for a long time but they are pretty inefficient. There is a reason you only see them on low end cruisers; not sport bikes and dirt bikes--where performance counts, they're too inefficient.

    Rolhoff makes a lot more sense. External gearing has problems which are resolved by the speed hub but the chain doesn't inherently have problems. I suspect, one could quite easily seal the chain on a Rolhoff or singlespeed if having your chain open to dirt were the motivating factor. The other issue people complain about for Rolhoff is moving the weight distribution to the rear. I think one could move the compound planetary gearing to the BB area and take care of the weight distribution problem.
    Oh sh!+ just force upgraded to cat1. Now what?
    Best thing about an ultra marathon? I just get to ride my bike for X hours!

  21. #21
    notabouttoseeyourlight
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    there's a huge gearbox thread going on at ridemonkey right now... gearboxes are going to be the wave of the future.

    Gearbox Info:

    Bike builders:
    - Lahar
    - Honda
    - GT
    - B1
    - Nicolai
    - BCD
    - Orange
    - Nox cycles
    - Alutech
    - Solid bikes
    - MBK
    - MSC
    - Racebike
    - Ellsworth
    - Richi-engineering
    - BikeSchrott
    - Centurion
    - Diamondback
    - Kelly's bicycles
    - Devilwork cycles www.dw-cycles.com
    - James Dodds - ex Keewee top10 pro (Dh derinbox, onboard diskbr)
    - Rob Metz -Ex Avanti/Keewee designer (all mountain derinbox)


    Gearbox makers:
    - Suntour
    - Universal Transmissions
    - Hayes

    Hub makers:
    - Shimano
    - SRAM
    - Sturmey-Archer
    - Fallbrook Technologies.
    - Nupace www.nupace.com / www.freeridehubs.com

    Rumors:
    Rocky Mountain? Specialized?, Santacruz? Evil?

    http://www.ridemonkey.com/forums/showthread.php?t=97295
    cycle tracks will abound in utopia.

  22. #22
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    The derailleur system needs to go, that's for sure. I can't see gearboxes working on lighter bikes but this is the freeride forum so... Doesn't Honda make a big ass bike w/ a gear box now?

    I agree I think an internal transmission is the next big thing...

  23. #23
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    Internal g-box will happen just to be different from a derailluer. I hope it does too. Shaft driven motorcycles have virtually instantaineous engaugement. If they can make that happen to a mtb, ROCK ON ! ! ! Weakest part of a mtb is the drive train IMO. It gets used the most, takes the most abuse & gets neglected as much.
    "Why are you willing to take so much & leave others in need...just because you can?"

  24. #24
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    Quote Originally Posted by ShaftMan
    Hi MTB'ers,

    I know there are a lot of pros and cons to going chainless, but why not
    ask *me* about what it's like to ride, using a drive shaft.....Instead
    of wondering?

    My Fuel 80 and my Specialized Enduro are collecting dust since
    my Dynamic Outback arrived![ATTACH]193908

    Happy trails.

    ShaftMan
    Very Cool!
    I bet that thing is silent on the trails.

  25. #25
    Who are the brain police?
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    Shaft drive bicycles were invented 100 years ago. They didn't catch on because...

    Not as efficient as chain drive.
    Weight.
    Too complex.
    Less gear range.
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  26. #26
    Gears
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    My Shaft Drive Bike

    Hi AlliKat and the Group,

    You wrote:

    "sounds like you work for Dynamic"

    Well, I don't work for Dynamic. I'm just one of those
    guys who's sick and tired of replacing my drive train parts.
    After you've changed a few chain rings, chains and cassettes,
    you begin to wonder if there isn't a better way to transfer power,
    that holds up to the grinding dirt.

    We all started the race with clean, freshly lubed drive train
    components....The only difference is that mine *stayed* clean.

    Best regards.

    ShaftMan

  27. #27
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    AWESOME!

    I want one!

    With a basket in front and some cool reflectors!

  28. #28
    Who are the brain police?
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    You have to love the simplicity

    Quote Originally Posted by ShaftMan
    I'm just one of those
    guys who's sick and tired of replacing my drive train parts.
    After you've changed a few chain rings, chains and cassettes,
    you begin to wonder if there isn't a better way
    You have to love the simplicity of a shaft drive. Nothing can go wrong...
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    Ween - The Grobe
    Yellowman - Strong Me Strong
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  29. #29
    Now rollin the Big Hit
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    the...

    The 2 wheel drive bike was Martini

    John
    Hailing from Reno, NV by way of Vegas...
    Now rockin the Big Hit!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  30. #30
    Old No. 7
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    We have a bike with a drive shaft collecting dust in our backyard. Got it for $10, wasted $10 actually.
    06 888 RC2X FOR SALE! PM FOR DETAILS

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  31. #31
    Road/XC/Freeride
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    The only reason i see for switching to drive shaft is less maintainance which'd be pretty nice - especially with a gearbox
    I'm on the Twitter.

  32. #32
    Gears
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    How quiet is my chainless/driveshaft bike

    Hi Twisted and the Group,

    You wrote:

    "Very Cool!
    I bet that thing is silent on the trails."

    My chainless is quiet enough to hear a pine needle drop.

    But I was as skeptical as everyone. I didn't want a bike that
    sounded like a 57 Chevy with a stripped pinion.

    There is a peculiar sound I keep hearing on the bike as I
    pedal. It sounds like a bed spring. I found the noise was
    coming from the outer shock coil touching it's adjustment stops.

    Putting a rubber washer on either side of the spring would make
    a stealth bike. Probably good for Dynamic's similar police version, which costs a $100 more.

    Cheers.

    ShaftMan

  33. #33
    dog meat ankles
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    All jokes aside...

    How tough is it?

    The bike they show on the site looks like it'd shatter on the slightest trail.

    Unless they can actually show that it works on something serious, I won't trust the tech and will instead stick to my dreams of an internal gearbox.

  34. #34
    Gears
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    How tough is my chainless bike?

    Hi PapaLegba and the Group,

    The question is.......How tough is my Dynamic Outback?

    The "Y" frame does look skimpy. I had a Specialized "Y" frame break
    on me at the seat tube weld......so I was careful to check the Dynamic
    for voids. Couldn't find any on the bike. The construction looks as good
    as my Trek.

    It's all 7005 aluminum......including the rear suspension unit. Is that
    type of aluminum brittle?

    I haven't broken it yet with my 220 pounds of fat and bone and pizza
    slamming.

    I'm hoping to hit a boulder with the drive shaft. Right now that would
    be hard, since it has so much damn ground clearance. I tried
    stripping the driveshaft gears by stomping on the pedals.....That
    didn't work.

    Give me more time........I can break anything!

    Cheers.

    ShaftMan

  35. #35
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    Crosstown 8

    I owned a Dynamic Bicycles shaft drive bicycle. The Sussex shaft drive was not built to specifications that could handle the torque generated when pedaling uphill, or pedaling hard on level ground. The result was that the shaft drive was not maintenance free--in fact, it broke. I replaced it with a new shaft drive sent by Dynamic Bicycles. The new one began to break and I was told by their Production Manager that I was exceeding the specifications of the shaft drive. I received a verbal agreement from him to refund the purchase price of the bicycle. Dynamic Bicycles even took care of the return shipping for the bicycle.

    Once they received it, however, the president of Dynamic Bicycles told me that I had owned the bicycle longer than 30 days, so the satisfaction guarantee no longer applied. I was given the option of having my bicycle returned to me with a tightened bolt and new grease, which would supposedly fix the problem, or receiving a refund minus the cost of shipping and a 15% restocking fee. Despite phone conversations, emails and then a complaint process with the Better Business Bureau In Eastern Massachusetts, Maine, Rhode Island and Vermont (http://boston.bbb.org/WWWRoot/SitePa...-ef5cf233e6a5), the president of the company would not uphold a verbal agreement stated twice and acknowledged by email. Because I do not live in Massachusetts, the state where Dynamic Bicycles is located, it made no sense for me to pursue a mediation or claim in small claims court, which would have required my presence. I will never do business with Dynamic Bicycles again, nor would I recommend doing business with Dynamic Bicycles. I am also weary of bicycles sold with shaft drives built by Sussex.

  36. #36
    I rot before I ripen
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    Quote Originally Posted by ShaftMan
    My Fuel 80 and my Specialized Enduro are collecting dust since my Dynamic Outback arrived!
    vaccinefiend,

    Sorry to hear about your bike troubles. You might want to try a chain-drive bike. I know where you could get a good deal on a Trek or Specialized.

    damon

  37. #37
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    The Millyard racing bike is king of gearbox bikes, it puts ALL gear box bikes to shame.
    Quote Originally Posted by holoholo
    why should I search google--when I can get a know-it-all like you to do it?
    Legend...

  38. #38
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    Quote Originally Posted by kamikazee ideki
    The Millyard racing bike is king of gearbox bikes, it puts ALL gear box bikes to shame.
    From memory though the gearbox is a reworked hub gear and its an enclosed chain rather than shaft. Pure function over style. If only they sold them!

  39. #39
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    Quote Originally Posted by kamikazee ideki
    The Millyard racing bike is king of gearbox bikes, it puts ALL gear box bikes to shame.
    not really, it is a great bike, it has a lot going for it, like the specially made shock. but I wouldn't say it puts all gearbox bikes to shame. the pivot point is in the wrong place (too low).
    G-EVO

  40. #40
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    Meh, the pivot can be that low because the shocks a beast.
    Quote Originally Posted by holoholo
    why should I search google--when I can get a know-it-all like you to do it?
    Legend...

  41. #41
    Urban Ninja
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    Quote Originally Posted by lebikerboy
    Christini is the name of the company with 2 wheel drive.
    Here's the link...

    http://www.christini.com/tech-about.php
    http://www.christinibicycles.com/

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