Posted on March 24, 2009 Under Gadgetry

Maybe you got outbid on yesterday’s DEVO art bike and you’d like to use your current bike to make your own art. For that you need the Contrail, a tool that attaches to your bike’s seat tube and leaves a colorful chalk line behind you as you ride. Brooklyn’s Studio Gelardi says they created it to build biker community. The Contrail holds 200 grams of chalk — enough for about 20 miles of riding — all the while leaving a faint line that reminds fellow cyclists where it’s safe to ride. As bikers follow, the chalk lines grow brighter “reclaiming the crucial shared space.” The Contrail was a finalist in Design 21’s Pedal To The Medal competition and is not in yet in production.