"And whoever all these cyclists are, as individuals, their individuality is burnished by the bikes they ride and by the way they ride them. It's as though the bikes are only partly transportation, as though they were really machines for differentiation.
And what aids the differencing is that few people wear helmets, and everyone is wearing ordinary clothes - none of the sleek and gaudy costumes you see on cyclists pumping through the peninsular hills and whistling down Sand Hill Road to the Caltrain station. They are themselves on wheels."
Thanks to Streetsblog