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 Post subject: Carbon disc brakes
PostPosted: Mon Feb 18, 2013 8:26 pm 
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bad kitty!
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Some years ago, I made a carbon disc brake. Back then I think it was pretty much a first, at least the first that was made reasonably right.
Now there is a company in the States that has given real carbon brakes a shot, and they have asked me to test one.
Today I was informed that a carbon rotor is on its way to me, so in like a weeks time, this could become pretty interesting.
The real interesting part about this, is that they claim to have managed to make something very similar to the brake I made, but at a fraction of the cost. Mine cost like 3500$ in raw materials, but ok, that was including pads. A bit prohibitive if you ask most people.
This company is going to offer carbon rotors at 100$ a piece, which is not really all that bad, considering that such a rotor ought to pretty much last forever.

The pic is of the one I made, and have used for the last couple of years.


Magura :)


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 Post subject: Re: Carbon disc brakes
PostPosted: Mon Feb 18, 2013 11:38 pm 
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revolting kitty
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What is the potential value gain of the carbon rotor and pads over traditional tech?


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 Post subject: Re: Carbon disc brakes
PostPosted: Tue Feb 19, 2013 1:40 am 
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stealth kitty
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Wmac wrote:
What is the potential value gain of the carbon rotor and pads over traditional tech?


Higher operating temps for long downhills, lighter weight.

The issue I'm wondering about is maintaining the operating temps for carbon brakes are usually critical for optimum braking performance.

-S

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 Post subject: Re: Carbon disc brakes
PostPosted: Tue Feb 19, 2013 10:36 am 
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bad kitty!
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Wmac wrote:
What is the potential value gain of the carbon rotor and pads over traditional tech?


No fading, stays straight, light, hardly any static friction, low wear, great modulation.....what's not to like? ;)


Magura :)

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 Post subject: Re: Carbon disc brakes
PostPosted: Tue Feb 19, 2013 10:38 am 
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bad kitty!
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Shibiwan wrote:
Wmac wrote:
What is the potential value gain of the carbon rotor and pads over traditional tech?


Higher operating temps for long downhills, lighter weight.

The issue I'm wondering about is maintaining the operating temps for carbon brakes are usually critical for optimum braking performance.

-S


They work perfectly fine when cold, but gains like 10% when really pushed hard for an extended period.
No need for the last 10% though, as they're pretty brutal as is.


Magura :)

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 Post subject: Re: Carbon disc brakes
PostPosted: Tue Feb 19, 2013 3:12 pm 
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revolting kitty
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Magura wrote:
Wmac wrote:
What is the potential value gain of the carbon rotor and pads over traditional tech?


No fading, stays straight, light, hardly any static friction, low wear, great modulation.....what's not to like? ;)


Magura :)


In the business I am in, I sell the best and most expensive software in the world for the category we operate in. The thing I am constantly up against is having, and charging for, WAY more than my customers need. The brakes I have, Elixer CRs, work just fine or better than I need. Just wondering what the potential value proposition of such an item would be to motivate me to run out and buy some.

No question they do all those things, but I don't ride my brakes to fading point and they are plush enough to operate with one finger already. I constantly struggle in my mind to stay off the brakes :) stays straight and low wear are attractive, but new rotors are pretty cheap to replace.

Sounds like the application is more geared toward DH or AM than XC, right?


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 Post subject: Re: Carbon disc brakes
PostPosted: Tue Feb 19, 2013 3:19 pm 
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chubby kitty
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Are you under NDA Mr.Magura or will you be able to write an early review which could get us some serious traffic for the main site? ;)


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 Post subject: Re: Carbon disc brakes
PostPosted: Tue Feb 19, 2013 3:37 pm 
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bad kitty!
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I'm under loads of NDA's, but those are all regarding medical stuff.

As for this, I'm free to write just as I please, and will do ;)
I'm a walking talking advertisement to them (if it works), and fairly competent info to us.


Magura :)

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 Post subject: Re: Carbon disc brakes
PostPosted: Tue Feb 19, 2013 3:44 pm 
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chubby kitty
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Nice! :thumbup:


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 Post subject: Re: Carbon disc brakes
PostPosted: Sat Feb 23, 2013 9:24 pm 
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revolting kitty
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You got the CF stuff yet?


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 Post subject: Re: Carbon disc brakes
PostPosted: Sat Feb 23, 2013 9:28 pm 
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friendly kitty
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Im super interested in these, I hope you have good things to say when you get them...


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 Post subject: Re: Carbon disc brakes
PostPosted: Sat Feb 23, 2013 10:05 pm 
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bad kitty!
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Wmac wrote:
You got the CF stuff yet?


No, it will take at least a week from the States to Denmark.


Magura :)

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 Post subject: Re: Carbon disc brakes
PostPosted: Sun Feb 24, 2013 5:33 am 
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stealth kitty
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Magura wrote:
Wmac wrote:
You got the CF stuff yet?


No, it will take at least a week from the States to Denmark.


Magura :)


They could have sent it to me. Would have been faster.

-S

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 Post subject: Re: Carbon disc brakes
PostPosted: Sun Feb 24, 2013 8:56 am 
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bad kitty!
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Shibiwan wrote:
Magura wrote:
Wmac wrote:
You got the CF stuff yet?


No, it will take at least a week from the States to Denmark.


Magura :)


They could have sent it to me. Would have been faster.

-S


Oh, I didn't think you knew anybody who could test it? ;)


Magura :)

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 Post subject: Re: Carbon disc brakes
PostPosted: Sun Feb 24, 2013 6:16 pm 
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friendly kitty

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Location: Santa Ana, California
I wanted to get in on the kickstarter program, but my rear hub is centerlock and I'm not crazy about running an adapter. I remember reading on their site that in order for them to produce centerlock rotors it would require licensing from Shimano, sounds like big bucks and probably will never happen besides, I think in order to do so they would need to make them the slightly heavier two piece.

I realize there are other benefits to these other than weight savings, but dropping weight is a good motivator to pull out my wallet.


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 Post subject: Re: Carbon disc brakes
PostPosted: Sun Feb 24, 2013 6:31 pm 
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chubby kitty
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Shimano blew it with centerlock licensing. I like that design 100x better than bolts. Oh well.


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 Post subject: Re: Carbon disc brakes
PostPosted: Sun Feb 24, 2013 7:39 pm 
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bad kitty!
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Yeah, Centerlock is dead, Shimano just haven't figured that yet ;)


Magura :)

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 Post subject: Re: Carbon disc brakes
PostPosted: Mon Feb 25, 2013 5:54 pm 
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stealth kitty
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Magura wrote:
Yeah, Centerlock is dead, Shimano just haven't figured that yet ;)


Magura :)


But centerlock wheels are going for cheap, probably because nobody's buying them. Maybe I can design a modified centerlock adaptor that bypasses their licensing. hehe.

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 Post subject: Re: Carbon disc brakes
PostPosted: Tue Feb 26, 2013 1:09 am 
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friendly kitty
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Magura
Curious ... What pad compound are you using with these ?

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 Post subject: Re: Carbon disc brakes
PostPosted: Tue Feb 26, 2013 1:17 am 
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bad kitty!
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BikeAbuser wrote:
Magura
Curious ... What pad compound are you using with these ?


You mean for the one I made, or the one I get to test?


Magura :)

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 Post subject: Re: Carbon disc brakes
PostPosted: Tue Feb 26, 2013 4:33 am 
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stealth kitty
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Magura wrote:
BikeAbuser wrote:
Magura
Curious ... What pad compound are you using with these ?


You mean for the one I made, or the one I get to test?


Magura :)


Lemme guess... burnt firewood?

-S

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 Post subject: Re: Carbon disc brakes
PostPosted: Fri Mar 01, 2013 10:12 am 
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bad kitty!
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Ok, carbon SiC rotors in da house!

Unfortunately, in about 5 minutes, Magura is not in da house.....
Pics and so forth, to follow shortly.


Magura :)

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 Post subject: Re: Carbon disc brakes
PostPosted: Fri Mar 01, 2013 1:20 pm 
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revolting kitty
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Way cool!


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 Post subject: Re: Carbon disc brakes
PostPosted: Fri Mar 01, 2013 1:42 pm 
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chubby kitty
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Tease of the month!


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 Post subject: Re: Carbon disc brakes
PostPosted: Fri Mar 01, 2013 5:29 pm 
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bad kitty!
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Ok, back at the castle, but it's too dark for pics.

Let me start out with a bit of info then.
It seems that Kettle has advised people, that break in is a simple 10 minute matter.
That unfortunately is not the case with carbon rotors, as the surface is not homogenous enough for that.
My experience is that 10 minutes will initiate the film transfer, but that's it.
Mine took like 5 hours to break in fully, and the ones from Kettle are rougher finish than mine were initially.
So wild guessing would say a few rides, or preferably a couple of nice DH runs, if available, with dragging of the brakes.


Magura :)

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 Post subject: Re: Carbon disc brakes
PostPosted: Fri Mar 01, 2013 5:43 pm 
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stealth kitty
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the teasing continues....

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 Post subject: Re: Carbon disc brakes
PostPosted: Fri Mar 01, 2013 5:45 pm 
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bad kitty!
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Shibiwan wrote:
the teasing continues....


I'll make sure it gets worse, just to please you ;)
Hmm, 3 rotors, where to put all those? Any suggestions? :D


Magura :)

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 Post subject: Re: Carbon disc brakes
PostPosted: Fri Mar 01, 2013 5:47 pm 
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stealth kitty
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Put all of them in the mail, addressed to me. :D

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 Post subject: Re: Carbon disc brakes
PostPosted: Fri Mar 01, 2013 5:48 pm 
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bad kitty!
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Shibiwan wrote:
Put all of them in the mail, addressed to me. :D


Naah, they send them for a RIDER, so sorry, no can do :D


Magura :)

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 Post subject: Re: Carbon disc brakes
PostPosted: Fri Mar 01, 2013 5:49 pm 
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stealth kitty
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Magura wrote:
Shibiwan wrote:
Put all of them in the mail, addressed to me. :D


Naah, they send them for a RIDER, so sorry, no can do :D


Magura :)


Touché.

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