front brake gives something like 70% of stopping power, so if you need just one, i agree that it should be the front. gotta ask, though, why not both? biking is cool. brakes make it so much safer, so you can be cooler longer. or maybe not kill a pedestrian. seriously! wtf?! start a trend. oops. already started. almost all bicyclists have had two brakes forever. with a fixed gear, you'll kinda have three. maybe three is better than two, which is better than one? or you could use hub brakes and rim brakes and a fixed wheel. then you'd have five! look out campy!

seriously. i have google give me all news articles with the word bicycle in them. way over half are about now dead bicyclists. usually involves a car, but a couple of good brakes and an alert rider and there won't be anything to write about.

stepping off soapbox now.