Originally Posted by phidauex
The pedal threading issue for 'left hand drive' fixies isn't a big deal. If you think about it, the threading on a regular bike is set up to loosen the pedals as you ride!
No, it's not.
Sheldon says:
"The right pedal has a normal thread, but the left pedal has a left (reverse) thread.
The reason for this is not obvious: The force from bearing friction would, in fact, tend to unscrew pedals threaded in this manner. The fact is, however, that it is not the bearing friction that makes pedals unscrew themselves, but a phenomenon called "precession".
You can demonstrate this to yourself by performing a simple experiment. Hold a pencil loosely in one fist, and move the end of it in a circle. You will see that the pencil, as it rubs against the inside of your fist, rotates in the opposite direction."