Biking in NYC is about to reach critical mass with citibikes but leave it to some brands to really capture the essence of biking: the utility, the style and leisure of it as a sport and transportation mode. The blog Downtownfrombehind has been capturing bikers in action for a while, at first from behind and anonymous. The blog started profiling subjects, like the guys of Saturday Surf: I had a brainstorm session with Coach people and inspired this partnership last year. That was fun to brew up! Fashion consultant and PR strategist Lorenzo Martone just launched Martone Cycling Co. He’s branded his bikes with a red chain and monochrome everything else, currently available in black, white, red, gold and silver. Especially cool is SRAM’s innovative duomatic gear system that automatically adjusts…