Does Specialized still build with 62mm OSBB shells?

Discuss light weight issues concerning road bikes & parts.
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jever98
Posts: 778
Joined: Wed Feb 18, 2009 12:02 pm

by jever98

OSBB on carbon frames was always 62mm wide, some of the narrowest out there. I was wondering if Specialized still builds their new frames like this?

Thanks
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No longer in the industry

by Weenie


dvq
Posts: 41
Joined: Mon Sep 25, 2017 1:36 pm

by dvq

I've got a 2018 Venge Vias Disc frameset with "OSBB" waiting to get built up -- I was surprised to find out it's just straight up PF30 68mm wide.

jever98
Posts: 778
Joined: Wed Feb 18, 2009 12:02 pm

by jever98

Thanks - did you measure the shell? Because the crank interface, if I'm not mistaken, was PF30 with the OSBB shell.

Edit: looks like Specialized has indeed changed back to 68mm, according to some blogs out there.
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Daniel1975
Posts: 154
Joined: Sat Dec 31, 2005 2:46 pm

by Daniel1975

Well done. OSBB was useless bullshit. I'm hoping everybody goes to the new threaded BB.

dvq
Posts: 41
Joined: Mon Sep 25, 2017 1:36 pm

by dvq

jever98 wrote:Thanks - did you measure the shell? Because the crank interface, if I'm not mistaken, was PF30 with the OSBB shell.

Edit: looks like Specialized has indeed changed back to 68mm, according to some blogs out there.


Yes, measured shell. Even double checked because I was sort of surprised.

Do you have a source for those blogs that stated this? I can't find anything.
Last edited by dvq on Tue Oct 10, 2017 8:59 pm, edited 1 time in total.

Digger90
Posts: 63
Joined: Sun Jun 21, 2015 9:34 pm

by Digger90

Daniel1975 wrote:Well done. OSBB was useless bullshit. I'm hoping everybody goes to the new threaded BB.



Touché. Threaded BB's will come back! :D

Cannondale deserve to be crucified for inflicting useless, POS, only-of-benefit-to-accountants, creaky, press-fit crap on the world.

dvq
Posts: 41
Joined: Mon Sep 25, 2017 1:36 pm

by dvq

Update to my earlier response, took some closer measurements.

https://imgur.com/a/hNN2P

Measured at the cups ~ 68mm
Measured at the shell ~ 66mm
Measured at the outer races of the bearings ~62mm

Not sure if this means I need spacers or anything for a regular bb30 crank.

by Weenie


jever98
Posts: 778
Joined: Wed Feb 18, 2009 12:02 pm

by jever98

That's very odd - looks like they retained their narrow bearing stance on a wider shell? As far as I know 68mm is the normal bearing stance.

Best
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No longer in the industry

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