Snap Chalktrail to the back of your bike and draw a line of chalk wherever your bike goes! Draw simple paths, twisting curves, figure eights, perfect circles, or grab a group of friends and create gigantic spirograph-like designs.

Dimensions (Chalktrail): 23.5″ x 5″ x 4.25″
Dimensions (Chalk): 5″ x 1.5″ diameter.
Snaps on to any bike regardless of size.
No tools required whatsoever.
One piece of chalk included.
Each piece of chalk lasts up to 1.5 miles (2.4 km).
Extra chalk available (includes 4 pieces).