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Keep your disks away from me

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

Keep your disks away from me

Old 06-06-19, 12:59 PM
  #26  
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I thought they had all gone to the "smooth" rotors now. Wait until people find out chainrings are covered with sharp, angry teeth. Racers will have to use smooth ones soon.
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Old 06-06-19, 03:23 PM
  #27  
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Nope

Originally Posted by mtb_addict View Post
Not sure why there's so much obstanance with disc break safety.
Every item of a bicycle is smoothed and rounded for both aero and safety...except the disc break rotor.
The discs are rounded and smooth on the edge. I have two sets of wheels and both sets of discs couldn't cut through butter. They're just plain dull.
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Old 06-06-19, 03:56 PM
  #28  
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Originally Posted by dmanthree View Post
The discs are rounded and smooth on the edge. I have two sets of wheels and both sets of discs couldn't cut through butter. They're just plain dull.
I sharpen mine so as to better weaponize my bicycle for friendly local competitive club rides.
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Old 06-06-19, 04:13 PM
  #29  
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Not so far

Originally Posted by mtb_addict View Post
Won't the grinding between the pad and the rotor will, over time, turn a dull edge on the rotor into a sharp edge?

Imagine the rotor is a metal butter knife, and the brake pad is a sharpening stone.
Overtime with alot grinding, even the butter knife will become a katana.
The pads don't reach the very edge, so no. Three years in and no sharp edges. That's why I can't believe any of the "hysteria" stories that usually follow this pattern:

Crash
Injury
I can't explain it, so it must have been discs, even though I can't prove anything

In the meantime, I don't race and I *love* the stopping power, wet or dry.
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Old 06-06-19, 04:28 PM
  #30  
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Originally Posted by mtb_addict View Post
Won't the grinding between the pad and the rotor will, over time, turn a dull edge on the rotor into a sharp edge?

Imagine the rotor is a metal butter knife, and the brake pad is a sharpening stone.
Overtime with alot grinding, even the butter knife will become a katana.
You don't sharpen knives, do you?

Knife edges meet at an angle. Brake pads are parallel to each other.
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Old 06-06-19, 05:58 PM
  #31  
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Originally Posted by MoAlpha View Post
I don't see why everyone's so worried about disc wounds. They're self-cauterizing, at least on steep descents where those awful crashes happen.
Keep the chain on the big ring, and the chain will cover most of those little spiky things.

Or, for that matter, go to a 1x system.

And, if you put on a 1xIGH system, then you can add a full wrap-around chain guard.
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Old 06-06-19, 06:40 PM
  #32  
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I'm trying to figure out if disc brakes are a political party or a religion. We have a guy who was in an accident, was hit on his right by the left side of a disc equipped bike, has a huge gash in his calf (with pictures), saw the blood covered rotor, and all of the sudden the internet is full of people saying it didn't really happen because " my new bike has discs and I like them"... I own a chainsaw but I'm not making comments on the internet minimising others chain saw injuries...
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Old 06-06-19, 09:43 PM
  #33  
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Originally Posted by kydeadhead View Post
I own a chainsaw but I'm not making comments on the internet minimising others chain saw injuries...
You can buy chainsaw chaps/leggings. (except not recommended for electric chainsaws).

Perhaps cyclists should wear chainsaw chaps (except on E-Bikes).
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Old 06-06-19, 09:55 PM
  #34  
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Apparently your chain lube is going to kill you, so no need to worry about discs.
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Old 06-06-19, 10:23 PM
  #35  
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Originally Posted by kydeadhead View Post
I'm trying to figure out if disc brakes are a political party or a religion. We have a guy who was in an accident, was hit on his right by the left side of a disc equipped bike, has a huge gash in his calf (with pictures), saw the blood covered rotor, and all of the sudden the internet is full of people saying it didn't really happen because " my new bike has discs and I like them"... I own a chainsaw but I'm not making comments on the internet minimising others chain saw injuries...
Cool story, bro. Love the strawman!
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Old 06-07-19, 06:52 AM
  #36  
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Where?

Originally Posted by kydeadhead View Post
I'm trying to figure out if disc brakes are a political party or a religion. We have a guy who was in an accident, was hit on his right by the left side of a disc equipped bike, has a huge gash in his calf (with pictures), saw the blood covered rotor, and all of the sudden the internet is full of people saying it didn't really happen because " my new bike has discs and I like them"... I own a chainsaw but I'm not making comments on the internet minimising others chain saw injuries...
Got a link? Any of those photos?
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Old 06-07-19, 06:54 AM
  #37  
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Just sayin...

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Old 06-07-19, 07:12 AM
  #38  
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Originally Posted by dmanthree View Post
Ack! Can't watch. Does it go right through or jam in the bone?

Last edited by MoAlpha; 06-07-19 at 07:27 AM.
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Old 06-07-19, 07:18 AM
  #39  
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I thought that the rider in the OP looked familiar - he's the guy that Phil Gaimon clowned in a video -

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Old 06-07-19, 07:25 AM
  #40  
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Originally Posted by kydeadhead View Post
I'm trying to figure out if disc brakes are a political party or a religion. We have a guy who was in an accident, was hit on his right by the left side of a disc equipped bike, has a huge gash in his calf (with pictures), saw the blood covered rotor, and all of the sudden the internet is full of people saying it didn't really happen because " my new bike has discs and I like them"... I own a chainsaw but I'm not making comments on the internet minimising others chain saw injuries...
Need to work on your reading comprehension - nowhere in the article is a “blood covered rotor” mentioned. He does talk about bloody shoes
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Old 06-07-19, 08:24 AM
  #41  
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Heh, heh...

Originally Posted by MoAlpha View Post
Ack! Can't watch. Does it go right through or jam in the bone?
If you choose to watch, you can see an orange spared by the discs, but mutilated by the real threat, the front crank. You know, that sharp jagged object that protrudes below the frame but, for some strange reason, has never caused any sort of injury, but dull recessed discs that only appear on some bikes are the culprit.

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Old 06-07-19, 08:44 AM
  #42  
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If I had a choice, I think I would rather be sliced by a disc rotor than sprocketed, especially with a chain-ring that was used in conjunction with hideously carcinogenic chain-lube.
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Old 06-07-19, 09:22 AM
  #43  
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Originally Posted by PepeM View Post
I liked this title better:

The meat slicers are at it again.
123456

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Old 06-07-19, 10:11 AM
  #44  
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Originally Posted by mtb_addict View Post
Disc pad is made of asbestos.

Asbestos <==> cancer
No, disk pads are not made of asbestos. Some automobile pads were...like 50 years ago.


-Matt
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Old 06-07-19, 11:07 AM
  #45  
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Originally Posted by Litespud View Post
Need to work on your reading comprehension - nowhere in the article is a “blood covered rotor” mentioned. He does talk about bloody shoes
From the Cyclingtips site where I read it, quoting from the riders twitter response "It's my right leg,was a right turn, rider flew up on the inside just before entry, he ripped the front brake, slid into me with speed. When I got up I saw his rear rotor and my shoe completely soaked in my blood, nothing else could have cut so clean and 4cm deep."
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Old 06-07-19, 11:08 AM
  #46  
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Originally Posted by dmanthree View Post
I can't watch this at work but all the videos I've seen showing how disc brakes don't cause injury only rest something on the brake while the wheel is spinning...they never jam something relatively soft the size of a leg into it with the same force that a body falling on a bike would be...while it is spinning.

I ride disc bikes but don't ride with others and don't race, so I only come at this from a curiosity perspective, but the youtube stuff I've seen hasn't really tested it like it should be tested.
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Old 06-07-19, 11:39 AM
  #47  
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That's the pattern

Originally Posted by kydeadhead View Post
From the Cyclingtips site where I read it, quoting from the riders twitter response "It's my right leg,was a right turn, rider flew up on the inside just before entry, he ripped the front brake, slid into me with speed. When I got up I saw his rear rotor and my shoe completely soaked in my blood, nothing else could have cut so clean and 4cm deep."
"Nothing else could have done it.."

Except a lot of things, like the crank or rear cluster, I guess. Still not buying it.
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Old 06-07-19, 11:41 AM
  #48  
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Damn...

Originally Posted by Marcus_Ti View Post
123456

I totally believe this. The discs on my bike are made of some really hard stuff and that truck wouldn't stand a chance.
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Old 06-07-19, 12:51 PM
  #49  
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Originally Posted by kydeadhead View Post
From the Cyclingtips site where I read it, quoting from the riders twitter response "It's my right leg,was a right turn, rider flew up on the inside just before entry, he ripped the front brake, slid into me with speed. When I got up I saw his rear rotor and my shoe completely soaked in my blood, nothing else could have cut so clean and 4cm deep."
Aargh - found it. Apologies. I'm off to find a reading comprehension class.....
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Old 06-08-19, 07:53 AM
  #50  
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Originally Posted by Marcus_Ti View Post
123456

Braking News
indeed.
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