In the snow is when brakeless makes the most sense imo. You can't go very fast and neither can anyone in a car; brake or no it's going to be hard to stop; a caliper will get clogged up with snow; and often using a front brake is just going to make you bail. Even beyond all these advantages there is something inherently moronic about riding a bike in the snow that somehow makes a brakeless fixed gear ideal. I rode brakeless for a month last winter during very heavy snow in the Greater Vancouver area, with two aero levers hooked up to nothing for extra jackassery, and had a really good time.
Last edited by mander; 11-05-09 at 08:21 AM.