Looking for gear ratio help

[rollin devils]

Ok I am building a lowrider bike.it has 4 inch crank arms.I was looking for tooth count recommendation.I don't want to peddle like a crazy man.would like to have a fairly easy peddle and have speed.it has kickback brakes so that kinda limits the rear gear. I'm not to good with gear ratios so I figured I'd throw this up,and see what happens.

 

[rollin devils]

Here's a pic of the bike if it helps

 

[Skipton]

This might help.... http://sheldonbrown.com/gain.html