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What is the quietest e-bike motor?

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What is the quietest e-bike motor?

Old 08-09-19, 09:53 AM
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01 CAt Man Do
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What is the quietest e-bike motor?

Since I find the whine of an electric motor to be somewhat of irritation I find myself wondering if there is an e-bike kit that is known for it's *quietness ( * either imperceivable to the ear or virtually imperceivable to the ear ). This question also applies to bikes already equipped with a motor. What brands are the quietest? My Trek Conduit has a whine that I can hear when using it. While it's not that loud it is enough to irritate me when I'm trying to listen to the sounds of nature. If I'm on the road with traffic or wearing ear buds and listening to music then it's not an issue but sometimes I just want to listen to the summer Crickets and Cicadas without the whine when riding on a wooded MUP.
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Old 08-09-19, 10:06 AM
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The Trek (and all OEM mid-drives AFAIK) has a geared motor (look at the ebikesca tutorials for an explanation), and they're noisier than direct drive (DD) motors (mostly confined to the DIY crowd, Stromer and other hub-drive systems). IMO, the quietest motor will be a DD with a sine wave controller. A Brose mid-drive could be the quietest of the bunch since it has steel gears and can use a belt drive instead of chain for reduction.

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Old 08-09-19, 11:56 AM
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Only tried a few. Terns w/ Bafang & Bosch, Oyama & Brompton.
Seems Bosch is the quietest of the ones I tried.
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Old 08-09-19, 03:11 PM
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Crickets and Cicadas annoy me more than any electric or other motor, and summer ones are the worst.
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Old 08-09-19, 04:42 PM
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I agree.
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Old 08-14-19, 11:38 AM
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Originally Posted by BiciMan View Post
Crickets and Cicadas annoy me more than any electric or other motor, and summer ones are the worst.
You had me going for a minute...till I saw the "winker" at the end. I love the natural sounds of a summer night. The annual summer Cicadas where I live are nice and relaxing to listen to. Sometimes their songs almost seem to harmonize. Also makes good background for some of my more ambient music on my Google play list.

Now it's the 17 year species of Cicada that can be a real PITA. Last time we had those in Md. was 2013. The 17 yr. ones are the noisiest and can fly right into you at times. You also have to dodge all the outer shells when they molt. Yep, the 17 yr. ones can raise a real ruckus when at their peak. Driving down the road you would think it was hail hitting your car windshield.

Used to be when I was a kid that the Whippoorwill was the nocturnal sound I loved the most. They are now a rarity where I live. Every couple years or so I will be fortunate enough to be on the right trail at the right time. Whenever I hear one now I stop in my tracks and the call takes me back in time when I was a boy and riding my bike home from my cousin's house in complete darkness.

My local favorite now are the Hoot Owls. Strangely, I haven't heard any this year which is quite odd.....although i did almost run over an Owl a couple weeks ago that was sitting right in the middle of an MUP. Scared the crap out of me. Usually see them ( or hear them ) while they are sitting in the trees. Anyway, the owl was likely snacking on the local frogs which are quite plentiful this time of year. Last night on my ride I dodged about 5 frogs and one fox that cut across in front of me not more than 15 ft. away. ( I loves the night )

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Old 08-15-19, 10:45 AM
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My 1500w/3000w large hubs with sine-wave controllers are absolutely silent. Even at night, they're eerie - all I can hear is tyre scrub, wind noise and chain noise, like any other bike, but more so due to weight and speed.

I took POV video and heard a low pitched whine from the motor through the hi-fi on playback. Weird to hear the motor. It happened because my camera was bolted to the handlebar, and it was picking up the frequency through the frame..

My 250w small hub is horrible. Sounds like there's a cat in there.
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Old 08-15-19, 04:22 PM
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Pretty sure both of my DD motors have square wave controllers (but don't care since I'm not changing them) since there's a slight, but noticeable noise from them.
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Old 08-16-19, 11:18 PM
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Brose gets the #1 spot.
Some Bosch are very quiet but not all.

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