I know there are a few more bikes on the roads than XFires, but ... I see the excitement building about 20+ XFires doing a run together, and one of my first thoughts was of the bike runs I go on. A group of us just getting together for a ride can easily be 20. A poorly attended charity run would be 50-75 bikes easy, a lot of the runs I do are 100-300 bikes, and one run each year is probably about 15,000 bikes.