In May, I went for a ride on the Mount Tam trails in Marin County, California, with Grant Petersen, the founder and owner of Rivendell Bicycle Works, and his buddy Dan Leto. It was a warm and sunny Sunday morning. As we were unloading the bikes from Dan's car at the trailhead (and Grant was working on a flat), an older gentleman in an Audi convertible pulled over to admire them.