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English 531 frames and Cotterless BB's

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English 531 frames and Cotterless BB's

Old 09-11-08, 03:35 PM
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Re Della Corsa
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English 531 frames and Cotterless BB's

Hi,

I am at present restoring a 60's English 531 framed bike. It has an old
chrome steel BB and spindle (Bayliss Wiley).
I intend to keep and return all the original parts as well as replace lost
or damaged ones with period equivalents.

However, it is also my intention to periodically "swap" some of the older
heavier parts with newer lighter ones depending on the occasion. This would
include chainset and wheels possibly for lightweight cotterless alloy ones.
These could be removed on occasion for the originals on "special" days.

My question is "are there any cotterless alloy sets, (BB, cranks, etc) that
I can fit to the old imperial threaded frame without re-tapping? Or are
there any spindles and sets that will fit the given measurements (below)?

I would appreciate your advice and info. Also, if nobody can supply this
info do you know where I could obtain it.

Measurements---

BB---------24Tpi
Threaded outside diameter----------1 3/8in (35mm)

Spindle---------11/16in diameter hole (17mm).
2 inch (50mm) flange centre to centre.

Cheers.
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Old 09-11-08, 05:03 PM
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Jeff Wills
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Originally Posted by Re Della Corsa View Post
Measurements---

BB---------24Tpi
Threaded outside diameter----------1 3/8in (35mm)

Spindle---------11/16in diameter hole (17mm).
2 inch (50mm) flange centre to centre.

Cheers.
"Standard" English threaded bottom brackets are 1.37" x 24tpi, left-threaded on the right hand side. The exceptions from that era are Raleigh:
http://www.sheldonbrown.com/cribshee...mbrackets.html
but since your bike isn't a Raleigh, you don't have to worry about this.

99% of current bottom brackets are standard English threading. You should be able to replace your crankset with anything your heart desires.
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Old 09-11-08, 07:16 PM
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Re Della Corsa
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BB's & 531

Cheers Jeff, much appreciated info. I can start right away!
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