Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About
It is currently Thu May 05, 2016 3:49 pm
Recently the board software has been updated and there are some known bugs/failures:
- Avatars are currently not being displayed ✔ FIXED
- Tapatalk connection is currently broken ✔ FIXED

If you find more errors please post it here: http://weightweenies.starbike.com/forum/viewtopic.php?f=7&t=139062


All times are UTC+01:00





Post new topic  Reply to topic  [ 28 posts ]  Go to page 1 2 Next
Author Message
PostPosted: Thu Jun 13, 2013 1:31 pm 
Offline

Joined: Sun Sep 27, 2009 4:28 pm
Posts: 220
I have a Parlee z0 fitted with the proper size Thomson masterpiece seat post and I notice that the post slips a
Couple millimeters per a 2 hour ride with 6nm of force on the clamp and a generous coat of carbon paste. Any suggestions? Thanks


Top
   
PostPosted: Thu Jun 13, 2013 1:37 pm 
Offline
User avatar

Joined: Fri Apr 12, 2013 1:19 pm
Posts: 739
Location: South West England
May be a silly question but are you 100% sure it's the right size post? Should be 31.6mm

Is the post/inside of the seat tube worn at all?

How much do you weigh?

A quick/easy temporary fix would be to wrap the inserted end of the post in a thin layer of electrical tape.

_________________
Scott CR1 - 7.1kg - dead
BMC SLR02 - 7.6kg - dead

Kinesis Aithein - ~8kg


Top
   
PostPosted: Thu Jun 13, 2013 1:51 pm 
Offline

Joined: Sun Sep 27, 2009 4:28 pm
Posts: 220
alexh wrote:
May be a silly question but are you 100% sure it's the right size post? Should be 31.6mm

Is the post/inside of the seat tube worn at all?

How much do you weigh?

A quick/easy temporary fix would be to wrap the inserted end of the post in a thin layer of electrical tape.


Just measured it with digital calipers. The post measure 31.6 millimeters so probably within tolerance. The post isn't worn and the frame is new.


Top
   
PostPosted: Thu Jun 13, 2013 1:51 pm 
Offline

Joined: Sun Sep 27, 2009 4:28 pm
Posts: 220
I forgot to add I weight 155 pounds


Top
   
PostPosted: Thu Jun 13, 2013 1:54 pm 
Offline
User avatar

Joined: Fri Apr 12, 2013 1:19 pm
Posts: 739
Location: South West England
I see no reason why it should be slipping in that case, unless there is an issue with the clamp? Try some threadlock/a new bolt maybe?

_________________
Scott CR1 - 7.1kg - dead
BMC SLR02 - 7.6kg - dead

Kinesis Aithein - ~8kg


Top
   
PostPosted: Thu Jun 13, 2013 2:08 pm 
Offline
User avatar

Joined: Mon Nov 02, 2009 8:38 pm
Posts: 293
Could be your torque wrench is out?

_________________
Blog: http://thesetbackpost.com/


Top
   
PostPosted: Thu Jun 13, 2013 2:19 pm 
Offline
User avatar

Joined: Sat Aug 29, 2009 4:30 pm
Posts: 1864
There has to be something else going on here. There is nothing about a Thomson seatpost that should allow unusual slip.


Top
   
PostPosted: Thu Jun 13, 2013 2:33 pm 
Offline

Joined: Sun Sep 27, 2009 4:28 pm
Posts: 220
Should I try more clamping force? Say 6.5nm?


Top
   
PostPosted: Thu Jun 13, 2013 2:48 pm 
Offline
User avatar

Joined: Fri Apr 12, 2013 1:19 pm
Posts: 739
Location: South West England
Ufgators wrote:
Should I try more clamping force? Say 6.5nm?


I'd personally check the clamp first.

_________________
Scott CR1 - 7.1kg - dead
BMC SLR02 - 7.6kg - dead

Kinesis Aithein - ~8kg


Top
   
PostPosted: Thu Jun 13, 2013 2:53 pm 
Offline

Joined: Sun Sep 27, 2009 4:28 pm
Posts: 220
alexh wrote:
Ufgators wrote:
Should I try more clamping force? Say 6.5nm?


I'd personally check the clamp first.


What do I look for in defective clamp?


Top
   
PostPosted: Thu Jun 13, 2013 2:57 pm 
Offline
User avatar

Joined: Fri Apr 12, 2013 1:19 pm
Posts: 739
Location: South West England
Ufgators wrote:
What do I look for in defective clamp?


Shearing of the bolt/nut, or the clamp may be slightly too large for the frame and therefore unable to provide suitable clamping force.

_________________
Scott CR1 - 7.1kg - dead
BMC SLR02 - 7.6kg - dead

Kinesis Aithein - ~8kg


Last edited by Devon on Thu Jun 13, 2013 3:30 pm, edited 1 time in total.

Top
   
 Post subject:
PostPosted: Thu Jun 13, 2013 3:25 pm 
Offline
Shop Owner

Joined: Sat Jun 13, 2009 4:02 am
Posts: 1980
Location: NoVA/DC
Grease between the clamp and frame. Grease bolt threads fully, and under the bolt head. As before, Tacx paste on post to frame.

Sent from my EVO using Tapatalk 4 Beta


Top
   
PostPosted: Fri Jun 14, 2013 8:24 am 
Offline

Joined: Mon Jan 02, 2006 7:10 pm
Posts: 491
I have always found that the Masterpiece posts are marginally smaller than the normal posts from Thomson. I wonder if the extra machining takes a small amount from the overall diameter. I know it is not the principle of WW, but if the torque is correct and the clamp ok, I would try another Masterpiece to see if it is a case of upper-lower tolerances, and then think about a non-Masterpiece. The weight savings are modest compared to having a robust seat fitting.


Top
   
PostPosted: Fri Jun 14, 2013 11:20 am 
Offline

Joined: Sat Apr 18, 2009 8:59 am
Posts: 693
Location: Surrey UK
If the Masterpiece is not robust, nothing is robust :wink:

_________________
Cervelo R5 VWD 5637g/12.43lb
Pronghorn XC SW Race 8284g/18.26lb


Top
   
PostPosted: Fri Jun 14, 2013 11:25 am 
Offline

Joined: Fri Dec 24, 2010 9:37 pm
Posts: 787
Location: it's raining, it must be uk
i had a similar problem with my ax europa post

6Nm, maximum rated torque - wrench checked against calibrated one at work
clamping bolt/nut threads clean and lubed
inside of seat tube degreased
the post is a tight fit

tacx paste didn't solve it - pink paste

finish line paste didn't solve it - white paste with gritty feel

but a mix of the two pastes did, at 6Nm the post no longer slips, been ok with this method for 3 years now

have to reapply paste mix any time i remove/refit the post, i.e. after boxing the bike for travel, otherwise it will slip without fail


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 28 posts ]  Go to page 1 2 Next

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Tacx Neo

[ Go to page: 1 2 ]

in Road

wheelsONfire

18

1928

Fri Apr 29, 2016 7:37 pm

fatbugger View the latest post

There are no new unread posts for this topic. How much Seat Post can I cut from this?

in Road

McGilli

5

656

Fri Jul 17, 2015 11:18 am

aronjancso View the latest post

There are no new unread posts for this topic. Attachment(s) Giant seat post help

in Road

tacostand

14

452

Fri Apr 15, 2016 7:24 pm

wingguy View the latest post

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

in Road

BugsBunny7788

2

455

Tue Mar 01, 2016 4:27 pm

biki View the latest post

There are no new unread posts for this topic. Light weight 25.4mm post with setback

[ Go to page: 1 2 ]

in Road

logy

19

507

Sat Apr 16, 2016 11:22 pm

prendrefeu View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: Bing [Bot], Exabot [Bot], gmakris, Ltoddokc, NYCPrynne, phourgenres, stubob, trex021 and 38 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