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  [ 19 posts ] 
Go to page Previous  1, 2
Author Message
PostPosted: Thu Apr 11, 2013 3:51 am 
Offline

Joined: Fri Oct 24, 2008 3:10 pm
Posts: 42
I had the same problem with my Madone seat mast and they told me to pound sand (always torque wrenched) . Glad it worked out better for you.


Top
 Profile  
 
Posted: Thu Apr 11, 2013 3:51 am 


Top
  
 
PostPosted: Thu Apr 11, 2013 8:50 am 
Offline
User avatar

Joined: Sat Sep 05, 2009 11:20 am
Posts: 1353
It doesn't matter what the max torque of the seat mast is, it might be higher than the max torque the seatpost can take.

The amount of of torque that should be applied is the minimum required to hold the mast in place without slippage.

_________________
"Step forward the climber and all those who worship at the altar of lightness" - R. Millar


Top
 Profile  
 
PostPosted: Fri Apr 12, 2013 2:24 am 
Offline

Joined: Tue Dec 23, 2008 2:57 pm
Posts: 670
Location: NYC
Fisherfreerider wrote:
The max torque on our seat masts is 7nM and the Bontrager preset torque wrench is 5nM so he is not over-torquing anything.


The correct torque is the minimum needed to fix the seat mast securely without going over the MAX torque spec for the BOLT. So if 4Nm is sufficient to hold the seat mast, then why crank it to 5Nm. The OP stated that he always used the 5 Nm preset key, yet the seatmast still damaged the seat tube. Assuming he did everything correctly are you saying he should confidently crank it to 5 Nm again?
EM3

_________________
______________

My 2013 Cervelo R5


Top
 Profile  
 
PostPosted: Wed Aug 06, 2014 2:56 pm 
Offline

Joined: Wed Aug 06, 2014 2:41 pm
Posts: 1
Here another person with a cracked Trek Set Post (2013 Madone 5.2). The crack looks exactly the same as in a picture shown in an earlier post. Right now Trek is evaluating the claim my bike shop sent (10 days ago already!).
I'm fearing Trek won't replace the frame as all signs look like the seat post was over torqued. Having a torque wrench I always feared torquing it to the max 7Nm (that Trek /Bontrager say is safe to apply) because it is really, really tight, so I never torqued all the way to 7Nm, but still the seat post cracked, apparently during one of my rides.

Anyway, I checked out some companies that can fix carbon and if Trek doesn't come forward, I'll most likely get it fixed for about $300.

As someone mentioned "we" should just ask our dealer and leave it up to Trek .. I'm glad others shared their story and turns out more people have the exact same problem. To me that looks like a manufacturing issue Trek might want to look into, because it's not right a frame can be damaged that bad by a seat post!


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 19 posts ] 
Go to page Previous  1, 2


Who is online

Users browsing this forum: Google [Bot], oneder and 35 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. what kind of seat post is this?

in Road

ZachUA

2

876

Fri Feb 21, 2014 2:22 pm

nealrab View the latest post

There are no new unread posts for this topic. Deda SuperLeggero seat post

[ Go to page: 1, 2, 3 ]

in Road

OwenJames

38

6088

Tue Sep 09, 2014 12:04 pm

LionelB View the latest post

There are no new unread posts for this topic. Parlee Z5i seat post clamps

in Road

ARL002

9

561

Wed Mar 12, 2014 8:38 pm

AndreLM View the latest post

There are no new unread posts for this topic. Seat post minimal insertion...

[ Go to page: 1, 2 ]

in Road

audiojan

16

1087

Wed Apr 02, 2014 11:32 am

audiojan View the latest post

There are no new unread posts for this topic. Need Seat Post Yoke Bolts, Where?

in Road

synthesis

2

198

Sun Jul 27, 2014 6:56 pm

synthesis View the latest post


It is currently Tue Oct 21, 2014 4:51 am

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