Here's the deal...
Build one of these http://www.instructables.com/id/Gravity-Bike/ using an existing bike or from scratch. 20" wheels only.
Make it ratty and stylish as you can BUT you must post a video or photo proving you rode it using gravity only at a speed of over 35 MPH before September...
I am a regular mountainbiker and trail builder. My daily rides are a steel Bridgestone MB-6 and a Gary Fisher Mt. Tam in brushed aluminum (no stickers or badges). I recently scored a little 48cc motor and decided to find an older frame to fit it to. I scored a skip toothed Higgins for myself and...
