If you want your investment to last, I think you should size the Ah of your cells based on the recommended discharge rate of the cell maker.
Calb recommends .3C. That keeps heat from building up. Heat eats capacity. If you create heat due to undersized cells, you have to cool them as well or risk them overheating and getting damaged. OTOH if you can't afford that or don't have room for them I guess you'll just have to purchase what you can.
I wanted a 100 mile range as I use mine for work traveling to jobs out of town, most less than 40 miles. A bonus of sizing for that is that my truck will cruise frequently at less than .3C current draw. I used 200Ah cells, 50 of them for a resting voltage about 160V. Higher voltage will reduce the current draw also for a given wh load.
My cells at recommended .3C discharge is 67A. Only on acceleration or hills will I exceed that and only for 30 seconds max. For the $$$$$$ that I spent on them, I want them to last a looong time and I have expectations they will.
Also the heat build up from high C discharge causes the electrolyte to vaporize which causes the case to swell. That has been reported a lot on here as well.
One more point, you'll lose weight and wh/mile so whatever your amp draw is now it will drop in my case an estimated 30% due to 25% weight savings and lower internal resistance. I'm also reducing non battery weight about 5% so if I'm lucky maybe a 40% reduction in ah!
Just don't skimp on the Ah if you aren't limited in some way so that you keep your amps down below .3C. Make those boys last!
