I had a bike with the 750 watt Bafang and one with the M620. The hub Bafang was quite a bit quieter than the M620 but not nearly as quiet as the Brose in my current bike. You have to strain your ears to even hear the motor. After all one of the main reasons I own an electric bike is for the peace and quiet.Not that I am aware of.
My Ultra not silent, but it is damn quiet. My friend has Sondors Rockstar w/Ultra. We've been riding together 4 days a week for 2+ years. His motor is considerably louder than mine even after he installed Cornhead grease. We concluded it is the resonance, or amplification coming from his aluminum battery downtube chamber. It's a big aluminum chamber. My bike is carbon fiber, and does not amplify the motor noise.
In all honesty the power feels about the same to me but my BBSHD bike is 52v vs my 48v M620 powered bike.Thats good to hear, but its much heavier than the bbshd, does it actually produce more power/ torque
Brose is quiet but i dont know that they are BBSHD level quiet and they are also a 250motor compared to a 1000watt.Want silence, I mean real silence get a Brose powers bike.
We must always remember the 250w is just legal speak.Brose is quiet but i dont know that they are BBSHD level quiet and they are also a 250motor compared to a 1000watt.
This is what a 1000watt BBSHD sounds like climbing, if anyone could make this climb with a 250watt Brose and produce less motor noise i would be impressed.
I hear more wind and breathing than motor on this video and this guys motor is exposed so its even louder, honestly i cant hear my actual BBSHD at all,
the motor on my bike is integrated into the frame so its completely encased.
Yes they come "pre lubed" but Bafang's definition of lubed is different from most lol, they put very little grease in their motors!
Maybe you just need to replace a busted gear? If i had one of those original motors i would for sure try and keep it going, not a sturdy as todays Ultra but they are even smoother and quieter!