I currently ride crystalyte 408 hub motor with 48V 12Ah SLA battery pack. My controller is the one with regenerative breakings (don't know the model though). I can currently ride around 40km/h (~25mph) on freshly recharged batteries and around 32km/h (~20mph) with partially drained batteries. My wheels are 26''.
I need more speed :). I would like to be able to ride around 25mph constantly or even more if possible.
I was wondering if I can add another 12V battery to make the whole pack 60V ? Would that fry my controller or engine?
I've read about some controllers not being able to handle more than 55V. Can I solve this problem by exchanging my controller to 36-72V one ?
How much can I expect from 408? I don't need acceleration due to the fact that I usually ride on even roads.