2 friends together, 2010

Who has some experience with the following item? It's an "extra wheel" for a bicycle, but i think it will be usefull for a scooter/step too. 5 years ago i saw this on the web, the bags where different.

Tochtje om te ontspannen : 84km : Marke - Kortrijk - Zwevegem - Bossuit - Helkijn - Spiere - Saint Léger - Leers - Wattrelos - Petit Audenarde - Ballons - Moeskroen - Tombroek -  Kwadebrug - Rollegem -  Aalbeke - Marke

Next time : Kortrijk to Armentiers and back 

+- 85km