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




Post new topic Reply to topic  [ 47 posts ] 
Go to page Previous  1, 2, 3, 4
Author Message
PostPosted: Sat Feb 22, 2014 5:12 am 
Offline

Joined: Sat Feb 23, 2008 6:33 pm
Posts: 251
fwiw, i have had 3 BB30 frames (cannondale) with zero issues. each frame has probably had 5-6K miles with the same crank and bb.


Top
 Profile  
 
Posted: Sat Feb 22, 2014 5:12 am 


Top
  
 
PostPosted: Sun Mar 30, 2014 4:08 am 
Offline
Shop Owner / Manufacturer

Joined: Mon May 26, 2008 12:21 pm
Posts: 98
Location: UK
Couple of things here, just for completeness ...

@bikerjulio,
The main problem with BB30 and other press-fit solutions is a combination of bearing walk and bearing alignment.

Bearing walk is made worse by the fact that all the native solutions that I know of, plus our own PT and UT solutions, use a pre-load washer to control variation of BB shell width / bearing placement and to pre-load the bearing. This means that the washer can further compress under the "walking" load, so allowing the bearings to perform the "walking" motion.

OT addresses these two points by first using a self-aligning bearing and secondly using a rigid system to fix the distance across the cranks relative to the bearing faces so making it nearly impossible for the bearings to walk - as they can no longer incline in the plane perpendicular to the BB axle in order to shift - there isn't "room".

@mattythemod

No worries :-)

AFAIK, the PT adaptors haven't changed length. I will check. Grinding them (if Campagnolo *did* make them longer) is still a bad idea - Campag didn't add the extra length (with all the tooling costs involved) for the fun of it ...

OT is not compatible with 10s, no. The ring spacing is wrong and you get issues with front shift and the chain touching the back of the big ring when crossed from the small ring - depending on the chainstay length, it can happen on the 1st three sprockets up, inconvenient if you are running, say, 53 x 39 and ride a lot on 39 x 14 in training, as many riders do ...

Team bikes - I don't know ref. the team bikes that are supplied by the retailer to their team as we don't look after them - all of the continental pro teams we are working with this year are on OT AFAIK ... last year, with Astana, they used Specialized's own cranks with modified rings (to get the correct spacings for EPS), the other teams had threaded BBs if I recall correctly.

_________________
A Tech-Reps work is never done ...
Head Tech, Campagnolo main UK ASC


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 47 posts ] 
Go to page Previous  1, 2, 3, 4


Who is online

Users browsing this forum: 5DII, bikerjulio, Bing [Bot], Google Adsense [Bot], Rob1519, wpccrunner, zappafile123 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. BB30 crank in nonBB30 frame

[ Go to page: 1, 2 ]

in Road

JimV

23

1640

Mon Oct 06, 2014 1:27 pm

HillRPete View the latest post

There are no new unread posts for this topic. Sram BBright crank fit on BB30 frame: Same as Quarq ?

in Road

LouisN

6

304

Mon Feb 16, 2015 4:29 pm

LouisN View the latest post

There are no new unread posts for this topic. Do I need a new shifter (more Campag woes)?

in Road

Lewis

10

791

Fri Jun 27, 2014 10:10 pm

bikerjulio View the latest post

There are no new unread posts for this topic. Campag Super Record BB question

in Road

SLCBrandon

4

462

Thu Aug 07, 2014 8:33 am

latman View the latest post

There are no new unread posts for this topic. Praxis campag bb conversion shipping!

in Road

sugarkane

11

974

Fri Jun 20, 2014 2:06 pm

Butcher View the latest post


It is currently Mon Mar 02, 2015 2:03 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



+++ ONLY FOR SHORT TIME +++
-10% on Schmolke        Discunt will be shown / added at the shopping basket. NOT combinable with regular WW discount!
▹ TLO Oversize road bar
▹ TLO FullOversize road bar 46cm
▹ SL Triathlon Bar
▹ TLO Triathlon Bar