In the last 40 years can you remember an adult lead character choosing to ride a bike as a form of transportation in an American movie or tv series?
If a minor character has a bike and uses it for transportation - it's clear they would like a car but for whatever reason they don't have one. Another character might say to them "Why don't you have a car?" and their reply will be something like "Don't ask."
Last night I watched "Flashdance (1983)". Jennifer Beals plays an 18 year-old who lives on her own and she doesn't have a car. She uses a bike instead.
It's been two hours and I still can't think of an American example. I'm total crap at any sort of trivia but I'm pretty sure the British spy tv series MI-5 has some bike riding in London. In any case - spies on bikes in the UK wouldn't be unusual. That makes me laugh because in American fiction it would be very weird for anybody riding a bike to work to a three letter agency in DC or Langley. It might appear in a comedy though because it's so wacky and implausible.