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 Post subject: BB30 or BSA?
PostPosted: Wed Dec 19, 2012 9:44 pm 
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Joined: Tue Nov 11, 2003 9:47 pm
Posts: 2138
Location: Santa Cruz, California, USA
I'm going to get a FM066 frame to make a #2 bike using left over parts including an Sram Red GXP crank.
Should I get BB30 or BSA? BSA seems so old fashioned. It would work with this crank but in the future I might want a BB30 crank. The increased heel clearance would be nice.

OTOH BSA just works. No fuss.

If I go BB30, which adaptor? Wheels' Manufacturing has two: http://wheelsmfg.com/products/bottom-br ... -sram.html" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false; and the "multiadaptor": http://wheelsmfg.com/products/bottom-br ... ranks.html" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;.

I like the all in one style that clamps into the shell like the Praxis (http://praxiscycles.com/pages/conversion" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;) but have not found one for GXP, only Shimano.


Many, many, many threads on this

https://www.google.com.au/search?q=bsa+ ... 66&bih=667" onclick="window.open(this.href);return false;


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 Post subject: Re: BB30 or BSA?
PostPosted: Wed Dec 19, 2012 10:38 pm 
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in the industry

Joined: Sat May 12, 2012 7:25 pm
Posts: 2510
Location: Glermsford, Suffolk U.K
threaded BB may be old fashioned but they work so well I am relucant to make the move myself. Also you crankset is for threaded BB so it not like you need BB30 anyway. Given its a cheap chinese carbon frame have they really got the tolerances for BB30 right, maybe they have I really don't know.

I am still fan of aquare taper BB's. An old fashioned square taper crankset with a Ti BB can be as light as many modern cranksets and the bearings last a long time.

The wheels manufacuring BB30 adapters seem quite good. I have used them on customers bikes and no problems reported yet.

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 Post subject: Re: BB30 or BSA?
PostPosted: Thu Dec 20, 2012 8:24 am 
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Joined: Thu Aug 25, 2005 7:09 pm
Posts: 1235
Location: In the industry
One key difference between BSA and BB30 or even PF30, is that threads do give you more tolerance for inperfect diameters.

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