Cannondale Dutchess Concept Bike

The Dutchess is a concept bike designed for Cannondale by Wytze van Mansum, a student at the Delft University of Technology in the Netherlands. Features include an enclosed drivetrain and brakes, folding handlebars, internally routed cables and wiring, and folding levers that act as wheel locks. Both fenders are integrated into the frame, with the rear acting as a structural member. At this point the bike is purely conceptual, though Cannondale claims some of the technology may be used in future production models.

23 Responses to “Cannondale Dutchess Concept Bike”

  • Mike says:

    Pretty cool. I love the integrated fender (speaking as someone who is tormented at the moment by fenders that refuse to fit or stop rubbing on my latest bike). I wonder how that stem locking mechanism works? The hubs and bottom bracket certainly would take care of my tendency to tinker… nothing to adjust.

  • jonathan says:

    Some great design ideas there, but it needs a basket – with no place to put her bag of fruit, she seems to have dropped it just after getting on the bike.

  • Sharper says:

    I’m in awe of this design (a removable front basket/bag is clearly in order), but it often tears me up a bit inside to see these wonderful advances in design and technology. As a volunteer at my local bike maintenance collective, it is heartbreaking to turn someone away because we don’t have the special tool they need to fix very non-standard bottom bracket, or a specific part to repair a broken hinge on their folding handlebars.

  • thermador says:

    That is a great design. I wonder how much it cost to build?

    According to the website, they say it took about 13 months to build, it can carry 50 kg (110lbs), and it weighs about 14kg (31lbs). Front hub appears to by dynamo for the integrated lights and the rear hub is internal. I’m not sure if there is a front light or not, but the integrated rear light is pretty cool.

  • Ints says:

    Refreshing design ideas, my favorite being the BB and crankset. Regardless of how much I try not to, I keep on imagining a hamster running away in there for some power assist!

  • veronica choroco says:

    Its beautiful!!!! Beyond being pretty, its so functional. As a women-commuter rider, it covers a few of a pet peeves:
    - No back brakes, therefore you dress or long coat, won’t get caught in the brake.
    - No exposed chain or chainring, my pants or long skirts have been torn in the past.

    Awesome would be for a front basked, like everyone has suggested. It makes for carrying anything much more convenient. I don’t know how they would do that, but I’m all for it. An integrated front light would be great as well.

    I just hope future bike mechanics can figure out how to fix this little bike. I’m still wracking my brain trying to figure out how it all works.

    Regardless, great work! Amazing and inspiring!

  • Giffen says:

    The seat-tube angle is too high. Notice how the rider has to leave forward to pedal powerfully.

  • velocentric says:

    Needs a front basket.
    I like the inverted mixte frame element. The end of the upsweep could be integrated into the rear rack for more strength and also integrate a dual stand. The uber hollow cranks look like a maintenance issue and I wonder about the shaft drive losses. Also, I bet that locking pincher handlebar will get very noisy after a few hill climbs. The headset is not where I want moving parts. Still, it’s pretty and unique. A lot of bikes have been sold on those features alone.

  • Hercule says:

    Interesting ideas, but it has “steal me” written all over it. My ideal urban bike is cheap and nondescript. You can get most of the advantages with an ordinary “Dutch bike” – full chaincase, hub gears, dynohub. Plus you can carry plenty (I’ve had a 25kg bag of cement on the back rack of my Giant). I can’t see you carrying a bag of cement on that rack!

  • Eddie says:

    Wytze’s portfolio includes other interesting bike ideas. I’m sure critics will jump all over those, too. Gotta love this designer’s creativity and sense of design, though.

  • BikeManDan.com says:

    What a gorgeous bike, wow. The lines of it just flow so well
    The frame design and integrated fenders should definitely stick around for a production bike IMO

  • Frits B says:

    Velocentric: riese + muller have bikes along these lines. Look good but very expensive. http://www.r-m.de
    I wondered about the drive as it looks like shaft drive indeed. Could also be belt drive, but so far no info found.

  • Larey says:

    Wow! Many wow’s. I really like the idea of folding handlebars and how much easier it would be to extricate my bike from pubic racks after the bike crammers chain up after me. But that’s for the practical, the bottom bracket/drive train, now that is a work of art.

  • Alexander says:

    The drivetrain looks something like encapsulated chain from Katz-Bikes.

  • Alexander says:

    ^the encapsulated chain

  • Eddie says:

    My wife ^the rider’s boots.

  • Alan says:

    “I’m not sure if there is a front light or not, but the integrated rear light is pretty cool.”

    You can’t see it in the video, but there’s a small front light integrated into the underside of the stem.

  • Jessica says:

    Photos of the lights:
    http://www.flickr.com/photos/carltonreid/4109915634/in/set-72157622816199738/

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  • Michael Brisson says:

    Bummer. I wanted to view this. I sometimes, though rarely, have trouble with YouTube vids. I ALWAYS have trouble with Vimeovids. Jerky, to the point of being painful, to view.

  • andy parmentier says:

    beautiful rocker curves, like the mbt/ryn shoes and kangen jumps i just non-sequituredly recommended on this here ecovelo, and while i’m at it, remember those pump action children’s spinning tops..which converts up/down pump force into spinning rotational force. well it so happens that blood pulses thru the veins in a spiraling action. and i think that jumping/pumping up and down action of running/jumping in the kangoo jumps converts to happy blood spiral energy. because water is hexagonal (THE HIDDEN MESSAGES IN WATER) and those hexagonal bond angles have those same beautiful rocker curves, and that’s why water left to itself in nature will regain it’s water memory as it takes all those curves and spins as it tumbles around in rivers blah blah blah i’m off me rocker. a little water amnesia from too much information pollution, well, water needs to go find itself again on a nature retreat, which involves curves. too many straight roads after the roman empirical manner and humanity forgets it’s human memory. so i advocate curvier-ness since it’s often the shortest distance between two points, like a curved smile, i think victor borge said something about that.

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