Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About
It is currently Fri Apr 29, 2016 3:35 pm

All times are UTC+01:00




Post new topic  Reply to topic  [ 22 posts ]  Go to page Previous 1 2
Author Message
PostPosted: Wed Jun 26, 2013 9:21 am 
Offline

Joined: Thu Aug 25, 2005 7:09 pm
Posts: 1235
Location: In the industry
No need to overbuild the rims to such degrees. That's all.

Same reason why they don't (normally) make a 60T chain ring.

_________________
Fast falcons: http://www.youtube.com/watch?v=j3mTPEuFcWk" onclick="window.open(this.href);return false;
www.falcobike.com
Facebook: falcobikeglobal


Top
   
PostPosted: Wed Jun 26, 2013 1:41 pm 
Offline
Shop Owner

Joined: Sun Jan 03, 2010 4:58 am
Posts: 665
There is one company that has pictures of a clincher carbon rim that exploded when it reached 350psi [Reynolds?]. I would think that would not be the max rated load, but at least you would have a general idea what the failure load would be. I wondered what product they used [tire] that would be stronger than 350psi [since the rim was the weakest link].

I would love to have a job that would just test the product till it broke.


Top
   
PostPosted: Wed Jun 26, 2013 2:06 pm 
Offline

Joined: Tue May 23, 2006 9:39 pm
Posts: 559
petepeterson wrote:
Let me preface the following by saying I don't mean to sound snobby but it seems strange to me that you are riding lightweights/enves and concerned with ride quality and 5 psi here or there why are you running continental tires? Give veloflex/vittoria/etc and latex tubes a try!


Lightweight says never to run latex tubes...because of expansion due to heat from braking(?). but in general, there's more heat buildup with latex than butyl tubes i suppose. not sure about Enve wheels.

_________________
- AX Lightness Vial EVO D + DA9070 + Enve SES 4.5 CK hubs
- Parlee Z5 SLi + DA9070 + Enve 3.4 Tune/Dash hubs
- Parlee ESX + DA9070 + Enve SES 6.7 CK hubs
- Independent Fabrication Ti FLW + Campy SR11 + Enve 3.4 CK hubs


Top
   
PostPosted: Wed Jun 26, 2013 5:59 pm 
Offline

Joined: Tue Jul 27, 2010 8:31 pm
Posts: 1048
Latex and the Eclipse inner tubes are unsuitable for most carbon clinchers - another reason to stick with aluminium (weight savings and ride quality).


Top
   
PostPosted: Wed Jun 26, 2013 7:37 pm 
Offline

Joined: Fri Jan 07, 2011 6:58 am
Posts: 1151
Location: 604
I (touch wood) have not had a problem with latex tubes on carbon clinchers but I live in Canada with the polar bears.


Top
   
PostPosted: Thu Jun 27, 2013 7:28 am 
Offline

Joined: Wed Feb 09, 2011 3:03 am
Posts: 194
Reynolds Attack Carbon Clinchers with Specialized 23c Espoir Tires
- 200 lb. and I usually fill them to 110psi


Top
   
PostPosted: Fri Jun 28, 2013 2:37 am 
Offline
in the industry

Joined: Wed Oct 31, 2007 10:45 pm
Posts: 339
Location: Indianapolis
Butcher wrote:
There is one company that has pictures of a clincher carbon rim that exploded when it reached 350psi [Reynolds?]. I would think that would not be the max rated load, but at least you would have a general idea what the failure load would be. I wondered what product they used [tire] that would be stronger than 350psi [since the rim was the weakest link].

I would love to have a job that would just test the product till it broke.


We use a variety of tires, but the ones we use for testing to failure are Fortezza Tri Comps. Typically they withstand over 375 PSI before the Kevlar bead separates from the tire casing. The maximum we've seen was approximately 415 PSI; the tire failed and blew off the rim while the rim remained intact. Occasionally we'll see some slight delamination when the tire fails at these pressures, but no complete sidewall separations.

We have other standards that use more reasonable pressure limits, but testing to failure of some system component is where the learning happens, and it's way more fun. :lol:

_________________
ENVE contract engineer | Former Zipp test engineer


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 22 posts ]  Go to page Previous 1 2

All times are UTC+01:00


Who is online

Users browsing this forum: F45 and 3 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:  
Powered by phpBB® Forum Software © phpBB Limited