That young women on bicycles are entering NYC's asphalt jungle is a sure sign of social and environmental progress, far more significant than whether they wear Prada or helmets or not. Bikes are useful and beloved vehicles for people of all ages and incomes. Thanks for showing us another slice of this life.

It's too bad that some readers see only the most negative (and sexist) side to things. No matter how much a babe spends on her bike and outfit, it will wreak far less environmental damage than a single year of auto ownership. And anything to slow down the city's traffic will save lives. I like the babes.