The political influence of San Francisco's pro-bike movement has risen steadily over the past decade to the point where the chief advocate for cyclists sits on a powerful city commission and elected officials rarely tell them no. It's a long way from the early days, when bike enthusiasts could barely get city officials to return their calls. But a series of attention-grabbing street protests that started 15 years ago in the form of the monthly Critical Mass rides, which attract hundreds to thousands of cyclists, put bike interests in full public view. Elected officials took notice. "We've achieved a lot....