Help me find a BB!

Discuss light weight issues concerning road bikes & parts.
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DirtyKolache
Posts: 19
Joined: Sun Feb 23, 2014 7:41 am

by DirtyKolache

I have a Specialized Allez Race frame with an alloy OSBB. I'm putting a Ultegra 6800 crank on the frame and don't want to use an adapter. Will either of these BB's work or do I need to get something Specialized specific?

http://www.rotorbikeusa.com/products/bb ... acket.html
http://wheelsmfg.com/products/bottom-br ... board.html

deltree
Posts: 198
Joined: Mon Apr 23, 2012 10:21 pm
Location: London, UK

by deltree

I've used the Praxis conversion bottom brackets with good success. There are two road versions BB30/PF30 and a the OSBB version that you'll need.

http://praxiscycles.com/product/shimano-conversion-bb/

The delrin adapters are lighter but more of a hassle in my experience.

by Weenie


DirtyKolache
Posts: 19
Joined: Sun Feb 23, 2014 7:41 am

by DirtyKolache

I was wanting to avoid Praxis because my LBS can't get them.

deltree
Posts: 198
Joined: Mon Apr 23, 2012 10:21 pm
Location: London, UK

by deltree

Weird I punched my postcode into their site and it misses out quite a few LBSes that I know stock Praxis products. The UK distributor, Upgrade, has always been helpful to me. I seriously would recommend finding a shop that does stock them.

DirtyKolache
Posts: 19
Joined: Sun Feb 23, 2014 7:41 am

by DirtyKolache

Curious why those will not work when they are listed as the same dimensions.

deltree
Posts: 198
Joined: Mon Apr 23, 2012 10:21 pm
Location: London, UK

by deltree

A OSBB is 61mm wide. Any adapter that Wheels Mfg does needs two 3.5mm spacers to bring it up to the 68mm BB30/PF30. I'm not 100% certain their bottom brackets have that ability like their adapters.

You could always shoot them an email asking what exactly you'd need as their pages on the OSBB aren't working

http://wheelsmfg.com/products/bottom-br ... ckets.html :noidea:

User avatar
bikerjulio
Posts: 1901
Joined: Fri Dec 11, 2009 10:38 pm
Location: Welland, Ontario

by bikerjulio

deltree wrote:A OSBB is 61mm wide. Any adapter that Wheels Mfg does needs two 3.5mm spacers to bring it up to the 68mm BB30/PF30. I'm not 100% certain their bottom brackets have that ability like their adapters.

You could always shoot them an email asking what exactly you'd need as their pages on the OSBB aren't working

http://wheelsmfg.com/products/bottom-br ... ckets.html :noidea:


This advice is incorrect.

Specialized in an effort to confuse have TWO OSBB types. The alloy version that OP has is conventional 68 x 42 BB30.

see here http://www.specialized.com/media/whatsnew/CG0307_RevA.pdf

Personally I like the look of the Wheels adapter since it threads together.
There's sometimes a buggy.
How many drivers does a buggy have?

One.

So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.

http://www.youtube.com/watch?v=GekiIMh4ZkM

deltree
Posts: 198
Joined: Mon Apr 23, 2012 10:21 pm
Location: London, UK

by deltree

Ah jeez, sorry completely skipped the first part of out my mind :oops:

Yeah the alloy shell is wider, the Praxis BB will still install without using the included sleeves.

https://praxiscycles.com/wp-content/upl ... ConvBB.pdf

by Weenie


AptosBigRing
in the industry
Posts: 66
Joined: Mon Apr 04, 2011 9:59 pm
Location: Santa Cruz, CA
Contact:

by AptosBigRing

Hey Guys..
Our Conversion BB's and Forged rings are fully avail in UK by our distributor - UpGrade in UK.
As dealers sign up and stock, they are added to the UK Dealer Locator.
Give UpGrade a call and they will help coordinate with your shop of choice no problem.
Thanks!
Adam@Praxis
Praxis Works
Manufacturer
Santa Cruz, CA
www.praxis-works.com

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