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Help wanted - Older Pinarello Prince BB

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Help wanted - Older Pinarello Prince BB

Old 05-24-10, 04:43 AM
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Help wanted - Older Pinarello Prince BB

I am trying to identify the details of a Pinarello Prince frame as shown. It is from around the year 2000. It is made with their "Extreme Alloy" which was Scandium.

I can't seem to get a standard Shimano Italian thread bottom bracket to fit. (It is not an English thread for sure.) Any ideas of what to use?

Also, any info on the year and how it was originally kitted out would be helpful.



Thanks,

Ian
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Old 05-24-10, 08:35 AM
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How does the Italian bb "not fit"? Are the cups too big in diameter? If so then maybe, just maybe, it is English threaded.
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Old 05-24-10, 09:28 AM
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Or is italian or english, do you have a caliper and english cups? Just asking the most obvious stuff. Probably you are threading this thing the wrong way? Italian threading threads different than english threading.
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Old 05-24-10, 09:47 AM
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The thread pitch is different. It is the right diameter, but it is a different pitch. The threads seem to engage, then seize. I don't want to start stripping threads. The Italian BB I have is 24 TPI.



Originally Posted by ultraman6970
Or is italian or english, do you have a caliper and english cups? Just asking the most obvious stuff. Probably you are threading this thing the wrong way? Italian threading threads different than english threading.
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Old 05-24-10, 10:46 AM
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Originally Posted by ianstock
The thread pitch is different. It is the right diameter, but it is a different pitch. The threads seem to engage, then seize. I don't want to start stripping threads. The Italian BB I have is 24 TPI.
All Italian bbs are 24tpi (as are English). The only bbs that aren't 24tpi are French or Swiss at 25.4 tpi (1 mm) and obsolete Raleigh at 26 tpi and the probabilty of an Italian named frame made in 2000 being French or Swiss or Raleigh threaded is about nil.

I assume this frame didn't come with a bb so you have nothing to compare it to. So, all I can think is that is is Italian threaded (since you say the cups are the right diameter) but the threads are damaged. I'd take it to an LBS and have the threads chased and retapped to clean them up.
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