I have a f 37 I need to find a good tire for on and off road I already had the duro and it can't handle the psi to run on the rear. Also I can only make it a max of 8 miles. What is a good battery that could get me 50 miles on a lower setting.
I only got 13 miles slightly down hill I need to be able to go 26 at least on flat or slightly uphill. It's a stealth bike from Australia it's got 170 battery cycle on itIf I had some idea what an f37 was, and what kind of battery only gets you 8 miles, and what kind of riding you were doing, and what kind of load is on the bike, I could offer some ideas but you did not provide ANY of that necessary information.
It will be a LOT heavier than your current battery, unless its lead.