Drawing Bike Lanes with Your Tires
By Rocky Thompson on March 25th, 2009
This add-on sprays your rear tire with chalk so you can lay down some sweet lines and let everyone check out your swerve. The Contrail serves no purpose besides sprinkling your chain with chalk dust, though you could argue that if enough cyclists used the chalk lines then cars would know what places are most heavily trafficked. Looks like it’ll be a nice accessory for all those parades I ride in.

[...] via The Goat [...]