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  1. mebentz2

    Talk About The Kindernay Gear System

    Can you explain this built-in torque limitation in context of the higher power options? How is the 2300W achieved if the torque is limited? This chart seems to show that torque is way above 200 Nm? Or is this showing the output at the crank and not thru the belt drive gear ratio? When you...
  2. mebentz2

    What would you do with 4000W power?

    I just noticed this picture on their website: Looks like all around better efficiency: Curious what the efficiency delta is at ~200W of power for those trying to increase their distance...or what is the power level where the efficiencies intersect?
  3. mebentz2

    What would you do with 4000W power?

    If you have a 3kW motor, but only use 750W, then the battery drains at the 750W rate. This is always true. The only remaining factor is the efficiency of the controller. How much power does the battery provide to the controller to get 750W at the motor? At 90% controller efficiency, you're...
  4. mebentz2

    Question about security / quick release

    Are there different options for the axles on these bikes? Is it possible to avoid the quick release designs? What about security features for the seats and lights? As a city dweller, I frequently park my bike outside. One of the most annoying points of theft in the city all the quick release...
  5. mebentz2

    What would you do with 4000W power?

    Just to be clear - my intention isn't to actually ride at 40mph... it has more to do with being able to have more control over matching the speed of traffic that is going 25mph to 30mph. Maybe occasionally 35mph to reposition myself in traffic. I'd like to have headroom so that acceleration from...
  6. mebentz2

    What would you do with 4000W power?

    1) Isn't battery voltage a factor to counteract the back emf of the motor? I'd love to see a torque versus RPM curve for the ultra. 40mph feels like a good speed target for me, and I guess the human RPM matters too... That's a good point. I feel like my Juggernaut is running out of steam at...
  7. mebentz2

    What would you do with 4000W power?

    What would I do with 4000W? I think the more interesting spec is the max speed of the bike. I commute year round in Chicago with my Biktrix Juggernaut Ultra - which is a 1500W Bafang Ultra mid-drive on a fat-tire bike. To be honest, it doesn't feel that much faster than my Luna Stealth running...
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