I am selling powerful and fast ebike Jamis Tangier with 48V 500W bafang mid drive motor and Samsung 17.5A battery. Got from Amazon for 16 hundreds and install on my bicycle. Frame Size 16"-18". ( I think it is M-L), but for me was good with a max seat high, I use XL bikes. I used it for commuting from Langford to Victoria. Great motor with speed up to 40km/h. Battery range 40km. I used it a couple of months then started to work from home. The frame will fit everyone. Charger included. I switched back to road bicycle. Needs breaks tune up. You can google lots of great feedback about the bafang motor.