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What is the reason the braking surface of a disc has so many holes?

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What is the reason the braking surface of a disc has so many holes?

Old 04-30-19, 03:19 AM
  #51  
Witterings
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Originally Posted by MoAlpha View Post
You're all wrong. It's to reduce windage in crosswinds. Safety first.

My framebag could do with a few drilled holes in that case .... it's like a sail in a crosswind and have often been pushed off course when it's blowing.
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Old 04-30-19, 03:45 AM
  #52  
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Originally Posted by Witterings View Post
My framebag could do with a few drilled holes in that case .... it's like a sail in a crosswind and have often been pushed off course when it's blowing.
My torso too!
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Old 04-30-19, 05:42 AM
  #53  
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Originally Posted by taz777 View Post
My torso too!

Maybe it's not my frame bag that's to blame then
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Old 04-30-19, 07:12 AM
  #54  
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The holes help the rotors clear gunk from severed body parts.
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Old 04-30-19, 08:06 AM
  #55  
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Originally Posted by Kapusta View Post
The holes help the rotors clear gunk from severed body parts.
And if you're agile enough, when spinning, they make a great vegetable chopper.
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Old 04-30-19, 03:16 PM
  #56  
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I live in a very cold and hilly place and I am looking at disc brakes specifically for a winter bike to commute with. I am not a racer and cycling has helped me lose weight. So with these factors in mind, I think I can survive disc brakes with no holes in them since I am fat (need more stopping power) and ride in freezing minus 20 C (no fear of disc getting too hot).
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Old 04-30-19, 03:24 PM
  #57  
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Drum brake hubs.. they have been reliable for 40+ years..
friction material surface in the shoes is large , so don't wear much at all..


I built wheels for my winter MTB build .. studded tires.. from Finland..
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Old 04-30-19, 03:37 PM
  #58  
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Are you talking about this?

I have a 6 speed mtb bike with these but have no idea how to repair them. It has an arm screwed down to the front fork and rear frame making removal quite difficult. If they are some sort of primordial disc (reliable?) brakes then I need to hunt the vintage bike yard for a winter build.



Originally Posted by fietsbob View Post
Drum brake hubs.. they have been reliable for 40+ years..
friction material surface in the shoes is large , so don't wear much at all..


I built wheels for my winter MTB build .. studded tires.. from Finland..
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Old 04-30-19, 09:31 PM
  #59  
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sturmey archer makes a variety of products.. Sturmey-Archer | Products

Ive been using my British made ones since brfore the company resold many years ago ..

with a V brake lever very little hand lever motion is required ...









y
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