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




Post new topic Reply to topic  [ 17 posts ] 
Go to page Previous  1, 2
Author Message
 Post subject: Re: c40 tyre clearance
PostPosted: Tue Jul 10, 2012 6:46 am 
Offline

Joined: Mon Dec 20, 2010 2:54 am
Posts: 50
Hi,I used to have a Cervelo R2.5 and ran with the michelin PRO2. The clearance at the rear of the bottom bracket / chain stay section was so fine that if the tyre was dirty it would scratch the insides of the area. I posted a question to Cervelo who said it was to do with the stack height/ construction of the michelin tyre and perhaps run a lower pressure or change tyre. Not really an answer but a comprimise not worth its wait. Then surprise surprise surprise Cervelo recalled my R2.5 and gave me a new R3. I was told a run of R2.5's were recalled due to poor gluing results on that BB section. Later it dawned on me that I may have pulled the chain stay into the lugged section when the glue had failed and effectively pulled it tight/ friction jammmed it. The R3 despite having identical geometry and larger BB has a much larger clearance with the same tyre, and nearly the same with a Michelin Pro 25 mm tyre

My suggestion is given the C40 is a lugged frame, is to check the gluing of the frame at the wishbone and if possible accurately measure it against another C40 :shock:


Top
 Profile  
 
 Post subject: Re: c40 tyre clearance
PostPosted: Tue Jul 10, 2012 9:39 am 
Offline

Joined: Tue May 12, 2009 10:03 am
Posts: 395
Andrewjn wrote:
Hi,I used to have a Cervelo R2.5 and ran with the michelin PRO2. The clearance at the rear of the bottom bracket / chain stay section was so fine that if the tyre was dirty it would scratch the insides of the area. I posted a question to Cervelo who said it was to do with the stack height/ construction of the michelin tyre and perhaps run a lower pressure or change tyre. Not really an answer but a comprimise not worth its wait. Then surprise surprise surprise Cervelo recalled my R2.5 and gave me a new R3. I was told a run of R2.5's were recalled due to poor gluing results on that BB section. Later it dawned on me that I may have pulled the chain stay into the lugged section when the glue had failed and effectively pulled it tight/ friction jammmed it. The R3 despite having identical geometry and larger BB has a much larger clearance with the same tyre, and nearly the same with a Michelin Pro 25 mm tyre

My suggestion is given the C40 is a lugged frame, is to check the gluing of the frame at the wishbone and if possible accurately measure it against another C40 :shock:


Unlike Cervelos, I seriously doubt that the construction quality of the Colnago is the problem.


Top
 Profile  
 
 Post subject: Re: c40 tyre clearance
Posted: Tue Jul 10, 2012 9:39 am 


Top
  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 17 posts ] 
Go to page Previous  1, 2


Who is online

Users browsing this forum: AJS914, Baidu [Spider], Bing [Bot], cdtf, Exabot [Bot], FHKJ, Google [Bot], JimmyMoose, Junior7, mariovalentim and 85 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. Colnago M10 tyre clearance and dropout spacers

in Road

nikfunnell

10

843

Sat May 09, 2015 5:58 am

nikfunnell View the latest post

There are no new unread posts for this topic. Campag Bora clinchers on a Colnago C60 - tyre size/clearance

in Road

DrJeffers

12

527

Fri Jan 29, 2016 6:07 pm

sharkman View the latest post

There are no new unread posts for this topic. Colnago C60 tire clearance

in Road

Faapaa

6

568

Wed Oct 21, 2015 3:40 pm

Faapaa View the latest post

There are no new unread posts for this topic. Minimum Tire to Chainstay Clearance

in Road

fogman

6

859

Fri Jun 05, 2015 7:51 pm

Valbrona View the latest post

There are no new unread posts for this topic. TT vs. Road bike. Pedal clearance?

in Road

phourgenres

7

472

Thu Mar 12, 2015 11:47 pm

wingguy View the latest post


It is currently Mon Feb 08, 2016 10:30 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