As seen on TV

Wheel Writer

Mount the Wheel Writer directly to the spokes of your bike wheel. As the wheels spin, the bright computer-controlled LED’s illuminate to create a dozen different images and patterns. Amaze your friends with the real working speedometer that shows up as you pedal! The faster you ride, the more awesome the effects look!
Note: Wheel must be 20″ and up

Features
12 images and animations
Real working speedometer
Water resistant
Super bright LED’s show up in the day and at night!
Mounts directly to your spokes (20″ wheel and up)
Easy to replace batteries (3 AAA)
Auto shut-off
Pack Dims: 178mm W x 276mm H x 45mm D