Having a bit of a hard time wrapping my head around this one.
https://lunacycle.com/luna-fixed-stealth-ebike
I assume the motor has a rotor and planetary gears mounted on the bottom bracket spindle. That's kind of neat. Beats having a separate, bulbous motor casing sticking out like Bafang, Cyclone or Tongsheng. But it does mean you're stuck with that motor, never to be upgraded, and if anything goes wrong with it and spare parts are unavailable or discontinued, the entire bike has to be written off. At least something like Bosch or STePs presumably has a standardized mounting bracket for each brand and available spare parts. Wonder why Luna didn't just use one of those systems if they were going to go closed system.
I don't get the battery design. Looks like it's a custom extrusion for 18650 cells. But how would you access it if it needs repair or replacement/rebuild? Through the oversize "bottom bracket" after removing the motor? With each block of four batteries connected by wiring so they can be bent out of the way during extraction and insertion? Really like the clean look with all internal wiring, but again, if anything needs to be fixed, seems like it would be a pain in the neck to work on concealed wires.
https://lunacycle.com/luna-fixed-stealth-ebike
I assume the motor has a rotor and planetary gears mounted on the bottom bracket spindle. That's kind of neat. Beats having a separate, bulbous motor casing sticking out like Bafang, Cyclone or Tongsheng. But it does mean you're stuck with that motor, never to be upgraded, and if anything goes wrong with it and spare parts are unavailable or discontinued, the entire bike has to be written off. At least something like Bosch or STePs presumably has a standardized mounting bracket for each brand and available spare parts. Wonder why Luna didn't just use one of those systems if they were going to go closed system.
I don't get the battery design. Looks like it's a custom extrusion for 18650 cells. But how would you access it if it needs repair or replacement/rebuild? Through the oversize "bottom bracket" after removing the motor? With each block of four batteries connected by wiring so they can be bent out of the way during extraction and insertion? Really like the clean look with all internal wiring, but again, if anything needs to be fixed, seems like it would be a pain in the neck to work on concealed wires.