Williams B239-F239?
Main Photo
Category:  Cranksets
Name:  Williams B239-F239?
Brand:  Williams
Model:  B239-F239?
Years:  1920's - 1970's
Country:  England
Added By: Paul Mayo on 09/06/16
Updated By: Paul Mayo on 09/08/16
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Williams B239-F239?Williams B239-F239?Williams B239-F239?Williams B239-F239?
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Chainring CountBCD N/A
BB StyleCotteredPedal Threads9/16" x 20 (English)
BB Length Flutes Crank Arm; None
Lengths 165Arm/Spider MaterialSteel
Front MarkingsWilliamsBack MarkingsEBW logo, ZF (=1965) 48 (for number of teeth)
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General Information
This Williams 5-spoke, cottered, fixed chainwheel, 3/32 inch teeth, joggled teeth line dates from 1965. The style seems to arise in the mid-1960s alongside the long-running C34 type. Other recent examples on eBay date from 1965 and 1967 with 46 and 48 teeth and also with fluted arms. Looking at the 1932 catalogue on the www.threespeedhub website there is a very similar chainwheel type B239 - B standing for the 5-pin attachment. I have thus called this F239 (F for fixed) until evidence from 1960s catalogues emerges.
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Additional Resources
Resources:Reference & ChartsGear Calculator
Brand Information(click to expand)
 Williams produced cranksets from the 1920's through the early 1980's or later.  Most noted, perhaps unfairly, by their lower end cranksets which changed little from the 1920's into the early 60's.  ClassicLightweights has more information on this brand.
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