[smeej]

Perhaps, but I have hyperphantasia and could easily assemble/visualize a bike in my head without a clue what many of the parts are called. I know the big ones like "handlebars" or "pedals," but I haven't spent more than a few hours on bikes since childhood because of a deformity in my neck that makes my hands go numb in a riding position.

In some cases, it very well may be familiarity, but for some of us, it's just memory and visualization.

[jaggederest]

Yeah, that's where I'm at - I could take apart a bike mentally but beyond knowing "those are brakes", "that is frame", "those are gears", I have no specific bicycle knowledge.