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 Post subject: Re: Specialized OS BB
PostPosted: Wed Apr 24, 2013 7:10 pm 
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Joined: Fri Apr 19, 2013 7:38 pm
Posts: 2
Location: Oregon, USA
I have a Venge with the carbon OSBB that I'd like to run with my Campy group and Ultra Torque crank, then later swap the group to a DA9000 group - DA crank included. Can anybody using an UT crank offer an update on performance with whatever solution they use(d) and an opinion on the best solution? It looks like people have mentioned a Specialized conversion cup, a Campy conversion kit, the Wheels Mfg. kit, and the C-Bear kit.

Does anyone know if I might encounter problems running a Campy conversion kit then switch to a Shimano conversion setup? I am thinking I would go with a Praxxis BB to run my DA crank on the OSBB frame.


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 Post subject: Re: Specialized OS BB
PostPosted: Wed Jul 03, 2013 8:25 pm 
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Joined: Wed Jul 04, 2012 10:48 am
Posts: 9
thks to Bjorn, just hot off the press 3 july 2013, osbb shimano bb, praxis 144g, c-bear 127g
http://forums.roadbikereview.com/specia ... ost4396330

c-bear summarized:
It is important that the bearings sit next to the crank arm, offering optimal stability.
BB shell cannot achieve 100% manufacturing perfection. Alum offer zero flex.
Whereas composite (plastic) housing will mold itself to the shape of the BB shell in time.

As purdyd rightly described :
Quote Originally Posted by purdyd
1. c-bear product that Dcorn linked to gets rid of the plastic shims and is one piece aluminum specially built for the 61mm wide 46mm diameter specialized osbb bottom bracket so that shimano cranksets can be used
http://www.c-bear.com/en/osbb-en/shiman ... arings.php

2. I think c-bear is the only one that eliminates the plastic cup and it is press fit right into the carbon shell but c-bear doesn't seem to have instructions
To install , just need to press c-bear osbb-shimano bb in with a pressfit headset tool , that is it. Cannot be simplier, no need to figure out any add-on accessories, as there are NONE.


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 Post subject: Re: Specialized OS BB
Posted: Wed Jul 03, 2013 8:25 pm 


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