Jerry (not Liz) Moos wrote:
>
> (cut) A 1.25 mm pitch is extremely close to 20 TPI, so a thread
> diameter just slightly larger than the nominal 14mm might indeed make it OK
> for BSC arms. This was no doubt the thinking of TA engineers. Surprising
> someone didn't try this years ago, when French thread was a lot more common.
Actually it would have been more surprising if someone _did_ try this years ago. Back then, the French, English, Italians etc. all had their own standards for bicycles (the bad old days).
I think the appropriate quotation here is: "Tis with our judgments as our watches: None go just alike, yet each believes his own." --Alexander Pope (1688-1744)
Chuck Schmidt South Pasadena, Southern California
.