How about if we ran all downhill races at night and all riders wore this jacket? Then we could see how fast they were going? And races could start looking more like Tron.

How does the vest work?
In a nutshell, it uses a sensor on your wheel to send a signal to a microcontroller that then turns the numbers on and off on the vest.

Why did you invent this?
Have you ever outpaced cars and been honked at? Had a car almost wipe you out while making a turn? The Speed Vest was invented because we were curious to know if putting more information in front of drivers might change their awareness of bicyclists. That, and we suspect a lot of people don’t realize that an average person can bike 10-15 mph (15-25 km/h).

Is Tron the future of bike racing?

http://www.youtube.com/watch?v=brSyZ5l-Yr0

Check my speed jacket