DIY Bike and Trike Plans

  • Gravity Bike racer - England, UK
    John "Doc" Warner shares some photos of his modified bicycle for Gravity Bike competitions. Named "Hee-Bee GB II", Doc built the gravity bike for a competition this past May.

    What is a gravity bike?

    A modified bicycle with a frame that's low to the ground to reduce wind resistance and the center of gravity. It has narrow handlebars, no pedals or chains, front and back disc brakes, knee rests and long foot pegs so the rider stretches out horizontally.

    The goal is to descend steep downhill courses to reach insane speeds, often exceeding 90mph. This extreme sport has been gaining popularity worldwide for more than three decades and Gravity Bike races are held around the world.

    Competitors wear helmets (some races require full-face), leathers, speed suits, gloves, footwear, and elbow and knee pads. According to Doc, "It's a great sport, very cheap (to build and compete), fantastic fun, and very accessible to all abilities and ages. Perfect for DIY/home-builders. You can build a competitive bike for around £60/$100 (but) you can, of course, spend less, or much more.

    "This is my first Gravity Bike build. I made it earlier this year to enter the 2014 Penn House Gravity GP and finished second overall (Streamlined Buggy beat me by just over a second)."

    See more pictures of Doc's Gravity Bike in the builders gallery.
  • Recent Forum Posts


    Re: Building a Marauder

    After trying out a Tourmaster I would think the smaller front wheel would be slightly easier to flip back and forth to keep balanced. Smaller wheels

    Ox76 Today, 10:52 AM Go to last post

    Re: Building a Marauder

    Sounds like a nice project. Keep us updated.

    wendel62 Today, 04:08 AM Go to last post

    Re: Good evening from Sweden

    Welcome to the fun from the other side of the pond as Twinkle would say.

    darnthedog Today, 12:34 AM Go to last post

    Re: Good evening from Sweden


    What sort of traffic do you meet on the ride to work ?

    As twinkle said LWB can be harder to start off

    stormbird Yesterday, 06:35 PM Go to last post
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