“List Free, Shop Smart, Save Gas!” This is the motto of Randall’s bicycle-powered advertising business. He used an Extrawheel Voyager to prop his “Ad-Bird” and he can still haul cargo in his 6 Ortlieb panniers as he advertises. Way to multi-task. Also check out Extrawheel’s other trailer, the Advert — an alternate design for promoting your own business or cause by bike.