I have a 2018 pimbicyle that is no longer suported nor are there any replacement parts left. In fact, the company has renamed their business and wont help former cudtomers at all. My battery died and i would like to salvage what i have, looking to use the 750w rear hub motor. the bike has 8 gears so I'm not sure if i need a gear sensor or not, the original bike had a 48v bsttery so I'm thinking about a rear rack battery and controller, new display if needed to get this commuter bike back in service.