Originally Posted by CrimsonEclipse

I've carried a knife on the seat post, others have pepper spray.
Any weapon is only a supplement to good judgment. Try looking like a bicycle cop.

Practice drawing the firearm while free standing, straddling the bicycle, one handed, etc, once a day until it's second nature. Also have a plan. If you actually have to draw the weapon, it will likely be in a situation where things happen quickly and there will be no time to think.

CE