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Bike shop mechanics largely do work that any normal person of average intelligence and a 3rd grade reading level can do in their garage with simple tools. With youtube, owners manuals, and lots of other resources it is easy to learn how to do what a bike mechanic does, but the general public doesn’t care to learn and/or get their fingers dirty. As others have commented, a car mechanic gets paid much more because he/she is doing much more complex work. To elaborate on that briefly though, how can a shop/mechanic make much more of a profit on a tube...