How do the 3 inch tires that come with the VoltBike Outback stand up on pavement and are there road tires available for this bike?

VoltBike Outback comes standard with 27.5" x 3" tires Kenda Havok. Those tires are designed for light trails but could well work on pavement. They would also perform great in rain or snow conditions in the city. You may expect those tires to wear out little faster if used only on pavement, but it's nothing to worry about.