I took my 3rd or 4th run on my new lifepo4 batteries. These things are awesome. I've doing runs on 1/4th of the battery that my entire SLA batteries could not do.
I'm getting 3.5 AH per 6 miles on my 5303 hub motor. If I lose weight, maybe I can increase the efficiency. That means I can go about 18 miles on 10 AH. That'll be plenty for me I think. That's a good ride. I was shooting for 15 miles range. By the way, that's without pedaling and going between 15 - 20 mph.