Advertise on Bikeforums.net



User Tag List

Results 1 to 14 of 14
  1. #1
    Bromptonaut 14R's Avatar
    Join Date
    Feb 2005
    Location
    Central Florida - USA
    My Bikes
    2012 Brompton S6R; 2003 Litespeed Firenze; 1994 Diamond BAck Axis TT
    Posts
    1,654
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Cannondale Jacknife

    Design approved, apparently available Oct. 08






  2. #2
    Raleigh20 PugFixie, Merc LittlePixel's Avatar
    Join Date
    Sep 2004
    Location
    London UK
    My Bikes
    1982 Raleigh Twenty Hotrod Fixie; 1984 Peugeot Premier Fixie, 2007 Merc Lightweight folder
    Posts
    1,956
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Without the Spin wheels. That saddle is a little crazy it has to be said. Looks liable to flex/loosen pretty easily.

  3. #3
    Tuck Fexas SoonerLater's Avatar
    Join Date
    Jul 2006
    Posts
    229
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    WOW. What a smokin cool lookin design. Straight from Star Wars. Where do I sign?

    Quote Originally Posted by LittlePixel
    That saddle is a little crazy it has to be said. Looks liable to flex/loosen pretty easily.
    At least with a company like Canondale, you can be sure that (1) it's been throroughly tested and (2) if users do start experiencing failures, Canondale will get all over this like white on rice to fix it. A saddle failure on this design could result in serious injury. Canondale is just too big to take chances. If anything, the saddle hardware is probably over-engineered and heavier than need be.

  4. #4
    Tuck Fexas SoonerLater's Avatar
    Join Date
    Jul 2006
    Posts
    229
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Read more at treehugger.

    I didn't even notice the lack of a chain until I read that it is HYDRAULIC DRIVE.

  5. #5
    Senior Member caotropheus's Avatar
    Join Date
    Mar 2005
    Location
    Portugal-Israel
    Posts
    862
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    How will cannondale put brakes on that thing?

  6. #6
    Senior Member
    Join Date
    Feb 2006
    Posts
    391
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The Hydraulic Drive is what caught my attention too. I'm curious to see how this performs, though unfortunately it'll be some time before we find out how the long-term durability of the drive is... Have there been any hydraulic drive bikes in production before this?

  7. #7
    Tuck Fexas SoonerLater's Avatar
    Join Date
    Jul 2006
    Posts
    229
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by caotropheus
    How will cannondale put brakes on that thing?
    I can only guess that it is single speed, fixed gear...er... static fluid...er... um. Just back-pedal to brake the silly thing.

  8. #8
    Bromptonaut 14R's Avatar
    Join Date
    Feb 2005
    Location
    Central Florida - USA
    My Bikes
    2012 Brompton S6R; 2003 Litespeed Firenze; 1994 Diamond BAck Axis TT
    Posts
    1,654
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If you take a closer look at the frame, you will see a second "rail" under the first one used by the seatpost. It seems to me the seat would have another support, making a triangular structure instead of an "L" floating and supported by one screw.

    For the brakes, all you have to do is think, in English, "stop".

  9. #9
    Senior Member caotropheus's Avatar
    Join Date
    Mar 2005
    Location
    Portugal-Israel
    Posts
    862
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by bookishboy
    The Hydraulic Drive is what caught my attention too. I'm curious to see how this performs, though unfortunately it'll be some time before we find out how the long-term durability of the drive is... Have there been any hydraulic drive bikes in production before this?
    Probably the movement transmition is like a hidraulic cluch.

  10. #10
    Senior Member
    Join Date
    Mar 2006
    Posts
    2,013
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    http://en.wikipedia.org/wiki/Hydraulic_bicycle

    For Dahon, Shimano and others a 'Disruptive technology'? Unlike chain drive tandems, hydraulic bikes would not need to have riders in a line. If it has a way to store hydraulic pressure you could in theory 'save' energy on flat or down hill for use later going up hill. Regenerative braking is possible.

    Is there a press release?
    Last edited by geo8rge; 09-22-06 at 12:20 PM.
    2000 Montague CX, I do not recommend it, but still ride it.
    Strida 3, I recommend it for rides < 10mi wo steep hills.
    2006 Rowbike 720 Sport, I recommend it as an exercise bike.
    1996 Birdy, Recommend.
    Wieleder CARiBIKE (folding), decent frame.

  11. #11
    Professional Fuss-Budget Bacciagalupe's Avatar
    Join Date
    Aug 2005
    Posts
    6,344
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Wow, talk about proprietary parts.

    I'm sure this bike will be a nice conversation piece, but I doubt it will be all that practical. It even looks heavy as a truck. But it's probably best to wait until it moves from "vaporbikeware" into actual production before saying too much about it....

  12. #12
    Senior Member
    Join Date
    Dec 2001
    Location
    New Jersey
    Posts
    6,172
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I think that design for the extended seat post is exactly what the Strida should implement on their bikes. Cannondale should just forget about Hydraulic Drive and use a polished hub gear like the Nexus 8. I would also remove the Airshock on the front wheel because that bottoms out on hills after extended use and allow the use of a Brooks Champion flyer or maybe make their own spring saddle. I don't know how comfortable that saddle is but I don't feel great about being stuck the OEM brand.

  13. #13
    jur
    jur is offline
    Senior Member
    Join Date
    May 2005
    Posts
    6,183
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    I wonder how saddle height is adjusted. If moving up and down that main tube, then fore-aft postion is screwed up, one of the most important fit issues.
    My folding bike photo essays www.dekter.net/

  14. #14
    Senior Member
    Join Date
    Mar 2006
    Posts
    2,013
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    It looks like the seat moves back and forth on that arm.

    The arm may be spring loaded or flexible to act as a shock.

    The question in my mind is the hydraulic thing. If that works it could be curtains for chain drives on everything except racing bikes. In theory you could store energy both from braking and cranking. This could really change alot.

    Gears are a bit of a problem. All I can figure out is you could have a system with mutiple pistons. In other words when you turn the crank you would able to chose how many pistons you want to send fluid to. I suspect the first version is a one speed.

    BTW, I do not see brakes on that thing so it may actually brake regeneratively through the drive system.
    2000 Montague CX, I do not recommend it, but still ride it.
    Strida 3, I recommend it for rides < 10mi wo steep hills.
    2006 Rowbike 720 Sport, I recommend it as an exercise bike.
    1996 Birdy, Recommend.
    Wieleder CARiBIKE (folding), decent frame.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •