Step 12Observation
It's been a while since I turned my bike into a single speed by this less than secret method, but since I did it, I seem to have noticed a fair number of other single speeds pop up. Most of them follow the same methodology, just removing unused parts. Fair enough, I encourage it, but a fair number decide to do away with one of the brakes. Now it is true that the front brake does generate most of the stopping power, that is still no reason to remove the rear, and its a great reason not to only ride with a rear brake. By limiting yourself to only one brake you greatly reduce the versatility of your bicycle. While you may be fine most of the time with only your front, there will come a day, maybe on a long downhill, maybe a wet road, or maybe a cable snap that you will wish you had another method of slowing down. But if you're really willing to castrate your bicycle in such a manor, be my guest, just try not to crash into me.
By the way, the above only applies to freewheel bicycles, and seemingly only so single speeds. I have yet to see a person with a derailer equipped bike decide one brake is enough. If you ride a fixed gear, the fixed gear is a rear brake, and is more than enough stopping power most of the time. It's not a bad idea to ride with a front brake though, just for when the inevitable happens and your chain snaps, or something like that.
You'll never have to taste gravel or asphalt if you follow this great advice=]