Bicycle Design

Tag: tandem

  • CGI Concepts Rev2 Time Trial Tandem

    CGI Concepts Rev2 Time Trial Tandem

      Eric Streeter, of CGI Concepts, created this virtual model of a tandem for time trial racing. One prominent feature is the “split-drive” (seen in the rendering below) which “allows for power to be applied from each rider to the left and right sides of the rear hub independently.” Interesting idea, but the left side derailleur and freehub/cassette would…

  • Dave and Rob’s custom trike

    Dave and Rob’s custom trike

    After seeing the post yesterday about the DuoCycle, Dave Thompson sent me this picture of a similar trike that he designed and built for himself and his son. Dave’s son Rob was in a car accident three years ago and suffered a severe head injury that left him in a wheelchair. The trike Dave built…

  • Cannondale Simon electronic suspension and more

    Stanley Song, an engineer from Cannondale, was at CES with a prototype electronically controlled bicycle suspension system called “Simon”. This design replaces many of the internal mechanical parts (springs, valves, etc) with an electromechanical device that can vary the suspension based on rider weight and current riding conditions. Check out the videos of the prototype…

  • Joules, the electric stoker

    I talked a bit about electric bikes in my last post, so today I will share a different take on that subject. Meet Joules, the stoker on Carl’s home built electric tandem. Carl challenged himself by asking, “Could I build an electric tandem based on actually pumping the pedals?” The result is a design that…

  • Trek Lime tandem

    I did not think that I would get a chance to post over the holidays, but someone from Trek just sent me this shot of a prototype Lime tandem that I couldn’t resist sharing. Trek already makes a 7spd Cruiser tandem, a 24spd “Comfort” tandem, and two high performance domestically manufactured tandems, so the person…