The Great Braking Debate Thread (Disc/Rim/Cantilever/Fixie/InsertNewTechHere)

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warthog101
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by warthog101


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usr
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by usr

Unrestricted fairing use *might* get you to those 15% ;)

Or maybe not, depends on how much cd you save for the A you'd inevitably gain. I suspect the HPV scene hasn't really tried their hand at enclosing a non-recumbent rider? (why would they!)

Lina
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by Lina

Unrestricted fairing use would easily get you the 15% because those fairings would also improve the aerodynamics of the rider.

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Ritsuke
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by Ritsuke

For the disc brake users out there: What is the best combo in rainy/dirty road conditions? I have Dura Ace 9170 calipers with stock discs/pads. They make an AWFUL sound and always seem to rub with the slightest amount of dirt. Sunny, dry conditions work perfect.
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Dov
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by Dov

Use your rim brake bike in the rain!

Oh wait a minute...
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spdntrxi
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by spdntrxi

Dov wrote:
Mon Dec 06, 2021 8:19 pm
Use your rim brake bike in the rain!

Oh wait a minute...
yeah literally :mrgreen:
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TobinHatesYou
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by TobinHatesYou

Ritsuke wrote:
Mon Dec 06, 2021 8:16 pm
For the disc brake users out there: What is the best combo in rainy/dirty road conditions? I have Dura Ace 9170 calipers with stock discs/pads. They make an AWFUL sound and always seem to rub with the slightest amount of dirt. Sunny, dry conditions work perfect.

SwissStop RS. If you are suffering rub, advance/reset your pistons several times, floss them and make sure the caliper is aligned looking at the pad edges from ends of the caliper. Also the best position for avoiding rub when you’re really sawing your bike back and forth might not be perfectly symmetrical, especially for the fork. Forks tend to flex laterally in one direction more than the other, so you might want to shift the caliper a hair’s width toward the outside or something like that.

tomato
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by tomato

TobinHatesYou wrote:
Mon Dec 06, 2021 8:34 pm
Ritsuke wrote:
Mon Dec 06, 2021 8:16 pm
For the disc brake users out there: What is the best combo in rainy/dirty road conditions? I have Dura Ace 9170 calipers with stock discs/pads. They make an AWFUL sound and always seem to rub with the slightest amount of dirt. Sunny, dry conditions work perfect.

SwissStop RS. If you are suffering rub, advance/reset your pistons several times, floss them and make sure the caliper is aligned looking at the pad edges from ends of the caliper. Also the best position for avoiding rub when you’re really sawing your bike back and forth might not be perfectly symmetrical, especially for the fork. Forks tend to flex laterally in one direction more than the other, so you might want to shift the caliper a hair’s width toward the outside or something like that.
What is "flossing" a brake?

TobinHatesYou
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by TobinHatesYou

tomato wrote:
Mon Dec 06, 2021 9:12 pm

What is "flossing" a brake?

Cleaning the walls of the pistons.

tomato
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by tomato

TobinHatesYou wrote:
Mon Dec 06, 2021 9:17 pm
tomato wrote:
Mon Dec 06, 2021 9:12 pm

What is "flossing" a brake?

Cleaning the walls of the pistons.
:thumbup:

tjvirden
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by tjvirden

Ritsuke wrote:
Mon Dec 06, 2021 8:16 pm
For the disc brake users out there: What is the best combo in rainy/dirty road conditions? I have Dura Ace 9170 calipers with stock discs/pads. They make an AWFUL sound and always seem to rub with the slightest amount of dirt. Sunny, dry conditions work perfect.
Have you noticed a difference between front and rear?

I find SwissStop RS pretty good as an all-round pad, but they'll still howl if it's really wet. Unfortunately, I don't think there's an easy way round the noise that comes from dirt landing on the rotors; the clearance needed (small) dictates that. This is with GRX Di2 levers, Catalyst rotors and 9170 calipers.

The downside to the RS pad is when you need to dissipate a lot of heat - braking force begins to reduce. I wish they made a version with the aluminum back plate that the Exotherm has.

If the roads are really bad (I'm thinking grit/dirt) then sintered pads work well, and are not really much noisier than the various organic pads I've used. [Edit: in fact quieter in many circumstances, possibly because they heat up more easily]

Mcdeez
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by Mcdeez

Rode a rim brake with carbon wheels bike the other day.

It reminded me how the braking really sucks, its not even compairable to discs...

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tomato
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by tomato

Mcdeez wrote:
Tue Dec 07, 2021 6:00 pm
Rode a rim brake with carbon wheels bike the other day.

It reminded me how the braking really sucks, its not even compairable to discs...
That's just because you were going so much faster. :wink:

c60rider
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by c60rider

Ritsuke wrote:
Mon Dec 06, 2021 8:16 pm
For the disc brake users out there: What is the best combo in rainy/dirty road conditions? I have Dura Ace 9170 calipers with stock discs/pads. They make an AWFUL sound and always seem to rub with the slightest amount of dirt. Sunny, dry conditions work perfect.
As was quoted somewhere on the forum by Graeme FK, quiet disc brakes in the wet are the Holy Grail ie it doesn't exist. The clearance is so close on wet/gritty roads (I'm talking British lanes here so unless you ride those you won't know) that you'll still get a scraping noise between the caliper and the pad even when you're not braking. Nothing will prevent this noise unless you just gently brake for a second or two to clear it. Within a few seconds it's back again as the spray sends gritty muck back up there in between pad and caliper.

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warthog101
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by warthog101

Rim brakes aren't too quiet in the wet either.
That grinding sound is your rim being worn away.

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