Prosthetics For Bicycles

One of the local bike shops we frequent was running a special on tuneups, so we both took our commute bikes in a couple weeks ago for the work. No problem, but I quickly learned that my bike needed a whole lot of parts to be replaced, and the whole enterprise cost me about 5 times as much as I was expecting.

This of course begs the question — at what point when you replace part after part, do you have a different bicycle than when you started? I think the answer is when you swap out the frame.