[kawsper]

What weather would make your bicycle unrideable?

I can only think of heavy snow if you don't have fat tires, or maybe sun and 40+ degrees celcius.

[mikestew]

PNW black ice. I’ve lost count of the number of times that I ended up on the ground with torn tights and a bleeding elbow, wondering what the hell just happened. Now if it is between 30F-39F, I’ll just skip that ride.

[DrBazza]

> black ice

This. Pre-covid I cycled to work each day, and at 5am (!) black ice was frequently a nightmare on cycle paths that had smoother tarmac than the road.

[mdoms]

So yeah the two things you mentioned.