I live about 5 miles from town so I could bike that far, however what kind of challenge would that be.

My first version had a 16ah 12 volt battery mounted in the center of the frame, however this was not enough to go to town and back.
 

This version has two 33 ah batteries, which is plenty of power and gives me the option to switch the motors from 12 volts 24 volts.
The only problem is that there is soo much weight (50 pounds) that it is difficult to control.
I will probably have to move the batteries to the back of the bike, however this will cause even more problems with the rear tire.

Does anyone know where I can find a 26 x 1-3/8 inch 90psi tire?

One important thing to note is the pivot point for the motors is forward. This causes the tire to dig in when more force is applied thus preventing the wheel from slipping.
The small EB4 shock keeps it from bouncing and supplies the small amount of initial pressure.