Yep, I still get that too. To almost anyone who is not tightly connected with cycling, "road bike" = "ten speed" (regardless of how many speeds it has).
This following almost exact conversation has happened countless times:
[Brillig mentions that he cycles]
"On a Mountain Bike or something?"
"No, on a road bike"
"What do you mean? Like a ten speed??"
"Yeah, except they have more than ten speeds now" (Brillig at this point deciding if he really wants to go through all of this or just bail).
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If once a man indulges himself in murder, very soon he comes to think little of robbing; and from robbing he comes next to drinking and Sabbath-breaking, and from that to incivility and procrastination.
- Thomas De Quincey