HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Articles FAQ Contact About




Post new topic Reply to topic  [ 20 posts ] 
Go to page Previous  1, 2
Author Message
PostPosted: Sun Oct 13, 2013 6:40 pm 
Offline
in the industry
User avatar

Joined: Thu May 29, 2008 12:22 am
Posts: 598
MavicZack wrote:
For 2014, the CCU wheels get what we call TgMAX carbon fiber. It's a specific carbon/resin blend (several different kinds) that is followed by a heat treatment protocol to raise the melting point (Tg or glass transition temperature). Finally, the exterior gets a mechanical finish treatment to rough up the surface a bit. it provides amazing brake bite, especially in the wet where we measure stopping distances of 1/2 the nearest competitor.


Firstly, let me say that I love these wheel sets. A friend had a massive crash with these where he snapped his frame in two and only broke two spokes on his front wheel, fantastic!

Now to the detail.... What's the purpose of the higher Tg resin (I'm assuming that the carbon is the same) and what is the Tg going from/to. Also, 'roughing up' the braking surface sounds like a good idea but I imagine that it's just resin that's 'roughed up' so surely that will wear to smooth very quickly?


Top
 Profile  
 
Posted: Sun Oct 13, 2013 6:40 pm 


Top
  
 
PostPosted: Mon Oct 14, 2013 5:16 pm 
Offline
in the industry

Joined: Thu Apr 28, 2011 11:40 pm
Posts: 82
Location: Boulder, CO
Hi,
That's actually a great question about the rise in Tg. I don't know the precise details of original vs. new Tg. I do know that in testing of carbon clinchers during development of the CC 40, there were only 1-2 brands that came close or equaled the Tg of our TgMAX carbon. The rest melted or softened at a lower temperature. So, as an industry reference, it's pretty high.

Regarding the surface treatment. I'm told that wear on the carbon surface brake track will be nearly nonexistent. I'm told that the carbon surface is much harder than aluminum for example. So it should stay as coarse as the day it was born for many years.

_________________
USA Communications Guy
Mavic, Inc.
http://www.mavic.com
http://www.facebook.com/mavic


Top
 Profile  
 
PostPosted: Tue Oct 15, 2013 12:55 am 
Offline
in the industry
User avatar

Joined: Thu May 29, 2008 12:22 am
Posts: 598
I understand and agree about the wear on the brake track in general, the same will apply to any carbon brake track regardless of texture. What I'm wondering about is the actual texture on the new Mavic braking surface. I don't imagine that the texture itself will contain any carbon, my guess is that it's just part of the moulding process and the texturing might be designed into the mould itself so it is in effect just resin but feel free to correct me. :D


Top
 Profile  
 
PostPosted: Tue Oct 15, 2013 3:20 pm 
Offline
in the industry

Joined: Thu Apr 28, 2011 11:40 pm
Posts: 82
Location: Boulder, CO
Hi Stephen,
the brake track surface finishing treatment is applied post-mold. It's a guarded secret, but it's post production, mechanical and appears to be a bead blasting or etching that removes resin. All the little cavities and depressions between fibers where once there was resin are now opened up. It creates a really subtle surface irregularity which adds major brake bite and substantial water clearance in wet braking.
what's cool is that it also appears on Mavic's CC40 carbon clincher, which in combo with its interior construction makes it one of the most reliable and safest available.

_________________
USA Communications Guy
Mavic, Inc.
http://www.mavic.com
http://www.facebook.com/mavic


Top
 Profile  
 
PostPosted: Wed Mar 05, 2014 7:12 am 
Offline

Joined: Wed Nov 12, 2008 3:21 pm
Posts: 25
I've just got hold of a pair of supposedly 2014 CCU. The brake surface is smooth, and look no different from the CCU I've owned back in 2009.
Has anyone here seen a 2014 CCU before and able to confirm your observation on the brake track?


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 20 posts ] 
Go to page Previous  1, 2


Who is online

Users browsing this forum: Baidu [Spider], Bing [Bot], ChaosHokie, ironman1, j1mm, koryo, Scott!, skinnyrider, stuartrc, wingguy, wootenlakeguy, Yahoo [Bot] and 42 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Mavic Cosmic Carbone SLE or SLS

in Road

nelson

4

8070

Tue Feb 11, 2014 12:35 pm

ecguevara View the latest post

There are no new unread posts for this topic. Mavic Cosmic Carbone SL discontinued?

[ Go to page: 1, 2, 3, 4 ]

in Road

pdlpsher1

46

2833

Wed May 21, 2014 6:42 am

pdlpsher1 View the latest post

There are no new unread posts for this topic. Removing decals from Mavic Cosmic Carbone SLR

in Road

lippythelion

4

862

Fri Apr 25, 2014 9:02 am

lippythelion View the latest post

This topic is locked, you cannot edit posts or make further replies. Sticker removal on Cosmic Carbone SLR's: HELP!!

in Road

bikawright

0

539

Mon Mar 10, 2014 7:39 am

bikawright View the latest post

There are no new unread posts for this topic. Canyon Ultimate CF SLX frame set ME vs EL difference.

in Road

gianimadrid

3

1594

Tue May 27, 2014 1:24 pm

aarw View the latest post


It is currently Wed Nov 26, 2014 10:38 pm

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB