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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 01-05-12, 01:07 AM   #1
vanderhoogta
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Bottom bracket question

Been trying to do some research before asking, but here it goes, I currently ride a Schwinn cutter, and have a basic sealed bottom bracket (whatever came on it) and I have an older Austro-Daimler frame from the late 70's (too large for me if anyone wants or needs 60cm) and it has a Superbe bottom bracket on it. The only thing I've found is it's possibly pre Superbe Pro, but nothing for sure. Any way to know if there's a chance it'll fit without trying. If it helps it's got an ocatgon on one side. I can get pics in the morning if anyone needs. Also on a side note anyone ever heard of an aluminum frame with aluminum rear drop outs? Or are they something else?

http://seattle.craigslist.org/see/bik/2779762578.html
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Old 01-05-12, 01:39 AM   #2
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My guess is that its an American bb, and I'm pretty sure there isn't a way to convert from American to euro. The other way around is more common.
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Old 01-05-12, 11:39 AM   #3
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Give us another pic of the crankset from both sides. There's a possibility that Austro-Daimler BB might be French, if so there's no way to get it to fit in your Schwinn frame. The good news is that bottom brackets only cost about 20 bucks new, as long as you don't need anything exotic.

Aluminum frames typically have aluminum dropouts, with a steel insert to protect the metal from getting gouged.

I'm not sure what Street rider thinks he's looking at, but that looks like a 3 piece crank on the Austro-Daimler. Even so, it is possible to put an English bottom bracket in a frame designed for a one-piece crank.
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Old 01-05-12, 11:46 AM   #4
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Originally Posted by vanderhoogta View Post
Also on a side note anyone ever heard of an aluminum frame with aluminum rear drop outs? Or are they something else?
The dropouts on aluminum frames are usually also made of aluminum, but often have steel plates inserted in them as reinforcements.
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Old 01-05-12, 01:58 PM   #5
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Just to clarify that CL post isn't my austro two different bikes just happened to remember I had a question bout that one and thought I'd jack my own thread.
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Old 01-05-12, 03:35 PM   #6
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I'm not sure what Street rider thinks he's looking at, but that looks like a 3 piece crank on the Austro-Daimler. Even so, it is possible to put an English bottom bracket in a frame designed for a one-piece crank.
I was on my phone, the picture wouldn't load. I've had a few friends with similar stories, and that was generally the case.
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Old 01-05-12, 04:00 PM   #7
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Originally Posted by vanderhoogta View Post
I have an older Austro-Daimler frame from the late 70's (too large for me if anyone wants or needs 60cm) and it has a Superbe bottom bracket on it. The only thing I've found is it's possibly pre Superbe Pro, but nothing for sure. Any way to know if there's a chance it'll fit without trying. If it helps it's got an ocatgon on one side.
Octagon sounds more light Stronglight, not Superbe. Pictures would be nice.

...Just saw your pictures. The fixed cup is definitely Stronglight -- the octagon with two rings indicates English thread. The adjustable cup is Superbe, clearly marked as such. I suspect a previous owner wanted to replace the stock bottom bracket with the Superbe parts, but was unable to remove the fixed cup, so it was left in place.

Last edited by JohnDThompson; 01-05-12 at 04:05 PM.
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