This will be a perfectly standard English BB with 1.370in threads. The only other threading in standard diameter was used by Raleigh and was 26tpi instead of 24tpi. It came with a 70mm wide BB shell. I would just run a tap carefully through with plenty of cutting fluid.
Hilary Stone, Bristol, England
Craig Griffith wrote:
> Greetings from the Left coast. I have a curved tube Jack Taylor that is
> supposed to be a 1958 ex-works ( what ever that means) bike with track
> ends,braze-on fender loop mounts, and rear brake cable stops on the top tube.
> The fork tubes are round. The track ends have small tips on the rear end of
> the drop outs. Will the bottom bracket threads be typical 1.370" 24 TPI or
> could I have an odd ball. The fixed side is counter clock wise. The 1.370
> thread in just a thread or two and get tight. Was there a Whitworth threading
> in the past or do I just need to chase them out. Thanks in advance
> in San Luis Obispo, Ca.