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 12 (my birthday.
If there is any interest, I will post up my before photo here and follow with a build. If not, I'll start a regular build thread.
Come on and join me. I double dog dare you!
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 12 (my birthday.
If there is any interest, I will post up my before photo here and follow with a build. If not, I'll start a regular build thread.
Come on and join me. I double dog dare you!