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Please help-68MM Super Course BB shell question

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Please help-68MM Super Course BB shell question

Old 07-22-11, 06:17 AM
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uprightbent
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Please help-68MM Super Course BB shell question

Just found a Capella lugged 73' Super Course in my size, which looks in need of a complete overhaul. After reading through many Raleigh threading posts, I measured the BB to be 68Mm wide. I'm guessing the good news is I have many options with modern cartridge replacements? Sheldon, and others, have said that 68MM shells should have standard British threading, right?

Are there cases where the 68MM shell ended up with 26TPI?

Thanks in advance. While redundant, at least this wasn't another Brooks thread.
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Old 07-22-11, 07:11 AM
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nlerner
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Originally Posted by uprightbent View Post
Just found a Capella lugged 73' Super Course in my size, which looks in need of a complete overhaul. After reading through many Raleigh threading posts, I measured the BB to be 68Mm wide. I'm guessing the good news is I have many options with modern cartridge replacements? Sheldon, and others, have said that 68MM shells should have standard British threading, right?

Are there cases where the 68MM shell ended up with 26TPI?
Yes. I don't think these shells were ever wider, but I certainly could be wrong. It was the 26tpi vs. 24tpi thing, and Sheldon was unfortunately wrong in stating that the Super Course would normally have standard British threading. It's really hit and miss, unfortunately. However, I can tell you that I have a Capella-lugged '73 Super Course hanging in my basement and it has standard British threading. But so does my '72, which came with a cottered crankset!

Neal
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Old 07-22-11, 08:45 AM
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My 73 had standard British threading as well. Keep your fingers crossed as old Raleigh's are notorious for exceptions.
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Old 07-22-11, 08:58 AM
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I have an old Super Course before 1973 that had a standard BB with cottered cranks.
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Old 07-22-11, 10:58 AM
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Usually the Raleighs with the 26 TPI threading have a slightly wider shell, too. 70 mm (2 3/4") comes to mind. The Raleigh Twenty has a 76 mm wide shell (3").
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