Originally Posted by
BroadwayJoe
I was NOT considering overvolted X5 motors in my statement and I have no personal experience with them. I thought this thread was basically asking about the C9 or Conhismotor and I do operate that motor.
How many of you have direct experience with the C9? Nearly silent - nothing like those vids. Which btw - the lower one - buzzing noise is actually the camera mic vibrating against something that it's mounted too IMO.
There are practically silent chain systems such as the Panasonic of which I'm personally familiar. But my neighbor rides a rear wheel mounted Currie and I can hear that churning thing coming for blocks. If you have serious hills, you need to consider chain drive but I wouldn't go there unless absolutely necessary.
My years of experience with the ESR750 1:5 chain sprocket combination and 300k miles of motorcycle experience have taught me that I don't want anything to do with chain drives.
It's my opinion they're inferior 100+ year old technology and I think there's better ways to go if you want a simple, clean, quiet commuting machine. Attack me or my comments if you must but I speak the truth as I see it from probably a LOT more experience with this stuff than many of you who wish to continually attack me will ever have.
Joe,
I posted the you tube videos because I find it funny that so many who criticize the use of non-hub motors point to how quiet hub motors are compared to non-hub motors. However, when you watch the videos that many proud e-bike owners with hub motors have posted, you hear lots of motor noise. There are some videos of e-bikes with 9 C motors on you tube. I would agree that they are quieter, but they're certainly not silent. You can hear them, especially on acceleration. Personally, a non-hub motor is best for the area I live in--I need lots of torque for the mountains here. I'm glad you're happy with your hub motor. I love my non-hub motor. Enjoy and ride safely.
Here are a couple of videos of e-bikes with 9 C motors.