go green tire / bicycle tire

"Go green" tire is a mobile advertiser which moves all over the world and remind people the green lifestyle.
. this tire remind people environmental issues by printing a slogan on its tire print. At the first look, it seems like a normal tire. But while the bicycle is passing a wet area to dry area or passes a puddle, the tire prints the slogan "Go green". This trace is more constant during driving on sand or clay.The tire acts like cast and prints extruded text. This trace reminds people "using bicycles are helpful for environment and people health".
The message is made by the greenest vehicle ever.