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  1. C

    Setting up dual drivetrain ebike

    Found this design after deciding on doing a belt drive for the first stage and a sprocket and chain for the final drive. https://endless-sphere.com/forums/viewtopic.php?t=62190 Just wondering what the best way to connect the pulley to the sprocket would be. Would running a jack shaft in between...
  2. C

    2 Stage reduction kits

    Hey friends I’m back. Recently I made a post about building a diy mid drive and then got side tracked with some other stuff. Anyway once again I’m asking for some help. I’ve realized I’m going to need a two stage gear reduction. Obviously there are many options/routes, jackshafts, gearboxes etc...
  3. C

    Setting up dual drivetrain ebike

    So I found this https://michobby.com/products/maytech-5065-220kv-brushless-outrunner-motor-for-electric-skateboards-e-bike?variant=14373402345536. It has a 70kv offering which seems low enough to have a single stage reduction, either that or try to design a two stage reduction.
  4. C

    Setting up dual drivetrain ebike

    At this point I’m committed to the mid drive just out of pure stubbornness to make it work lmao. I’m gonna look into either a two stage reduction or see if I can fab a custom sprocket that isn’t comically heavy.
  5. C

    Setting up dual drivetrain ebike

    Haha I’m definitely more of a chain guy, I just think they sound cooler and I’m far more comfortable with them over belts and pulleys.
  6. C

    Setting up dual drivetrain ebike

    So all the motors I’m finding require insanely large gear reductions when I plug their Kv values into calculators. I’m looking at this https://hobbyking.com/en_us/turnigy-aerodrive-sk3-6374-192kv-brushless-outrunner-motor.html motor specifically. Theoretical speeds of 100+ mph meaning I’d...
  7. C

    Setting up dual drivetrain ebike

    Yeah for sure man thanks. Now I just need to figure out a good gear ratio. I’m a motorcycle guy so I’m used to not super extreme gearing ratios but this dude has like a 16/128 gearing or something absurd like that. Do you really need those kinds of gear ratios for acceleration and torque on...
  8. C

    Setting up dual drivetrain ebike

    Did some more research and found this video of a guy who built a mid drive. He just takes off the fixed gear, leaves the freewheel on the other side attached to the pedals, and attaches a belt and pulley system to the other side to be powered by the motor. The motor doesn't spin the pedals even...
  9. C

    Setting up dual drivetrain ebike

    Ahhh I see. I read in another forum post about how a freewheel attached onto its own drive train is unnecessary because the freewheel on the other side of the hub would allow it to coast, but I’m guessing that’s incorrect. I don’t believe I have a keyway I think it’s just threaded on and...
  10. C

    Setting up dual drivetrain ebike

    Yeah this is how I wanted to do it in theory, nice to see my idea validated haha. Hey so what exactly is the benefit of using a freewheel on the motor shaft instead of just a regular sprocket? Also sadly I don’t think that freewheel would work on my hub cuz I’m pretty sure my flip flop hub...
  11. C

    Setting up dual drivetrain ebike

    I would if I could brother.
  12. C

    Setting up dual drivetrain ebike

    Dope dope I’ll just search the forum for LHD drives, thanks again!
  13. C

    Setting up dual drivetrain ebike

    Thanks for the reply! I’ve been looking through the forum and most of the builds for mid drive motors seem to use a freewheel chainring/crankset to facilitate independent motor and pedaling. And it seems like dual chain drive systems on a flip flop hub are very rare because flip flop hubs are...
  14. C

    Setting up dual drivetrain ebike

    Have you figured out the design for your bike yet?
  15. C

    Setting up dual drivetrain ebike

    Yeah mainly just for kicks but I also just want to pedal and have a mid drive instead of using a hub motor so a dual drive train seems to be the only/best way to accomplish that. I’m not really into pedal assist bikes, much prefer independent drives for pedaling and the motor.
  16. C

    Setting up dual drivetrain ebike

    Cool thank you thank you!
  17. C

    Setting up dual drivetrain ebike

    Hey friends. Like many of you stuck in quarantine I’ve been thinking of ways to pass the time. I have a bunch of old motors, sprockets, chains etc and I figured I’d convert one of my old bikes into an ebike. I would also like to pedal it, otherwise I’d just strap a brushless motor onto the...
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