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Why are higher-end freewheels (cassettes) so much louder when coasting?

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Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Why are higher-end freewheels (cassettes) so much louder when coasting?

Old 07-29-20, 03:46 PM
  #26  
seypat
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Originally Posted by JPChap
How many watts will it add?
I think it depends on which one of the sound cards you use. Probably good for at least 20 watts.
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Old 07-29-20, 04:01 PM
  #27  
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We did that as kids -- using playing cards attached to a seat stay with a laundry pin. Sometimes the pin would go right into the spokes.
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Old 07-29-20, 04:21 PM
  #28  
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Originally Posted by rubiksoval
Or you could just... soft pedal.

Quite a thing to go through all the work of pulling apart a freehub so you can coast for a few seconds once or twice a season.
Making SunTour Winners quiet wasn't hard. They weren't very loud to start with. I was not strong except in the big hills so I knew I needed all the help I could get in the rest of the races. Compared to a lot of my training rides, overhauling a FW was pretty darn easy.
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Old 07-29-20, 04:58 PM
  #29  
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I dont know why everyone says that CK hubs are loud. Maybe their MTB offerings are but my R45’s are only slightly louder than my old Shimano hubs. No where near as loud as the Hope hubs that I have on my gravel bike.
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Old 07-29-20, 05:16 PM
  #30  
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Just trendy.

It takes energy to create sound. It should be optimized away.
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Old 07-29-20, 07:07 PM
  #31  
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According to Chris King, it was an accidental by-product of the design. He claims they were working on a new grease product that would make the hub quieter, but they stopped when they started getting a lot of feedback that everyone loved the "angry bees" sound. Check it out here, starting at around 11:35 or so: [I'm not allowed to post links yet, but you can search on youtube for a GCN video from May 1, 2018 called "Ask Chris King Anything ..."]

I've got White Industries hubs, which are pretty noisy, but I kinda like it. It's not like loud hubs sound like Harleys or anything like that ; )
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Old 07-29-20, 07:45 PM
  #32  
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Originally Posted by InvertedMP
I wouldn’t say the DT Swiss 240s is a low end hub, and it’s insanely quiet.
Not the new one.
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Old 07-29-20, 07:49 PM
  #33  
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Originally Posted by Noctilux.95
Not the new one.

The wheels I bought that have 240s hubs are maybe a week old, and they are insanely quiet.
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Old 07-29-20, 07:58 PM
  #34  
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Originally Posted by Bah Humbug
Some people won't hear anything, but there are people who move over when I coast with my stock HED hubs.
lol...they are loud indeed. When riding on MUPs, I don't need a bell.
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Old 07-29-20, 09:53 PM
  #35  
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Originally Posted by rubiksoval
What? I think everyone that races understands that you can coast in the draft.
not necessarily - an old friend who used to race told me that he would listen for gear changes when the terrain or pace didn’t warrant one, since it usually signaled that the guy behind was either tiring (maybe time to attack) or preparing to make a move (time to watch for an attack). Any time you can avoid giving your opponents free information is good
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Old 07-29-20, 11:52 PM
  #36  
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Originally Posted by downtube42
Just trendy.

It takes energy to create sound. It should be optimized away.
Yah, I find it annoying IMO. I see no reason for the loudness at all
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Old 07-29-20, 11:58 PM
  #37  
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Originally Posted by Litespud
not necessarily - an old friend who used to race told me that he would listen for gear changes when the terrain or pace didn’t warrant one, since it usually signaled that the guy behind was either tiring (maybe time to attack) or preparing to make a move (time to watch for an attack). Any time you can avoid giving your opponents free information is good
Your old friend didn't know much about tactics.

It's easy to silence your noisy freehub by pedaling in a big gear, but it's impossible to make a silent freehub loud.
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Old 07-30-20, 05:31 AM
  #38  
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Originally Posted by Litespud
not necessarily - an old friend who used to race told me that he would listen for gear changes when the terrain or pace didn’t warrant one, since it usually signaled that the guy behind was either tiring (maybe time to attack) or preparing to make a move (time to watch for an attack). Any time you can avoid giving your opponents free information is good
This is right up there with taking off a bottle cage in a crit for improved aerodynamics and weight savings.

You guys are regular bike racing ninjas.
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Old 07-30-20, 08:22 AM
  #39  
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Latest fad in cycling snobbery IMHO and I'm sure someone may say something about safety and being heard by pedestrians or other cyclists.
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Old 07-30-20, 09:35 AM
  #40  
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Originally Posted by taco2ewsday
Latest fad in cycling snobbery IMHO and I'm sure someone may say something about safety and being heard by pedestrians or other cyclists.
This is neither "latest" nor a "fad".

It's not new in the least.
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Old 07-30-20, 10:04 AM
  #41  
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Originally Posted by Ogsarg
The hub in my new bike is really loud but despite that, I find that almost no one hears it when I'm coming up on them on a bike path.
Most walkers I encounter are using earphones.
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Old 07-30-20, 10:15 AM
  #42  
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Originally Posted by rubiksoval
This is neither "latest" nor a "fad".

It's not new in the least.
OK not new but I still think there is a bit of snobbery at play
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Old 07-30-20, 10:41 AM
  #43  
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Originally Posted by taco2ewsday
OK not new but I still think there is a bit of snobbery at play
That's of your own creation.
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Old 07-30-20, 10:47 AM
  #44  
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Originally Posted by mpath
Most walkers I encounter are using earphones.
Better than those blasting their music over speakers.
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Old 07-30-20, 11:13 AM
  #45  
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The worst I've encountered was a lady in a running group blasting a metronome phone app to improve her cadence. That group stretched out quickly at the start to get away from her and her companion. It was worse than this.

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Old 07-30-20, 01:47 PM
  #46  
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FWIW, my Dura-Ace freewheels from the mid-80s (yes, I'm still using them) are the quietest I've used. Much quieter than any modern freehub.
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Old 07-30-20, 07:27 PM
  #47  
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My Fulcrum Quattro from a few years ago is loud. But new Campagnolo Shamal is quiet and I prefer it that way.
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Old 07-30-20, 07:53 PM
  #48  
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On one of my first brevets, which would have been ten years ago, a guy in the group had a loud hub combined with a tendency to pedal/coast, pedal/coast. Either of those alone is no biggie, but combined... I didn't know what the story was, didn't care, just had no interest in hearing that for the next 20 hours.

I don't think he ended up with very many riding partners.
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Old 07-30-20, 11:14 PM
  #49  
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Originally Posted by noodle soup
Your old friend didn't know much about tactics.
Cool. I’ll let him know 👍
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Old 07-30-20, 11:50 PM
  #50  
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I don't think it's a high end thing. I have two wheelsets with entry-level DT 370 pawl hubs, and they're insanely loud. A very metallic clicking sound. My ENVE alloy hub (40t ratchet) is far quieter and between wind, road noise, etc isn't particularly loud. Above all it doesn't have that metallic quality. I may just bite the bullet and get the tools and replace the pawls in the DT 370s with 36t ratchets (and matching freehub bodies). Grease helps, but it doesn't last very long.

I'm not sure how a freehub could be made quiet, perhaps with weaker springs, but then there's the risk of reduced engagement and increased wear.
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