I had one of those cable driven speedometers also. I they were specific as to wheel size.
My neighbor had a siren mounted on his bike that he activated by repeatedly pulling a chain. I always got to be the robber and he was always the cop. (the robber always got away)
I didn't wear any helmet. I'm thinking of putting my hair in a pony-tail tomorrow and taking a ride to the beach
helmetless!
I've been in a rebelious mood lately.