The unicycle, first seen in "Button Yer Ed" seems to be owned by Rolf and later given away to Kevin. Rolf was seen briefly riding the unicycle in "Avast Ye Eds." In a few episodes, like its first two appearances, it is usually seen ridden by the kids. Rolf was seen riding it briefly in "Mirror, Mirror, on the Ed" searching for Ed to help him squash raspberries. Rolf gave his unicycle to Kevin in "Fa-La-La-La-Ed," but Kevin was seen riding the unicycle to perform stunts to the kids earlier on in "Ready, Set... Ed!" In one of the Cartoon Network games, Ed Over Heels, Ed rides the unicycle to entertain Nazz in the last level. It is unknown if it is the same unicycle owned by Rolf.
- In "Button Yer Ed," it is known as the "Unicycle of Doom".
- In the first three episodes it was seen, the bike fork was colored silver and the seat was darker brown. However in "Mirror, Mirror on the Ed" and "Fa-La-La-La-Ed" the bike fork was red and the seat was light brown.