Hi gang,
I have been sorting cranks and find I have a number of crank arms with perfect threads but none of my English threaded pedals fit, but the apparent difference seems very slight ie the overall hole size would seem the same, but the pedal ends will catch the crank thread then go no further. I assume that the cranks in question are French threaded and would guess that the difference is possibly just the tpi in the same way that Raleigh bottom brackets differ from other Brit bbs, but can anyone suggest a rule of thumb on the different sizes as typically all my 50s/60s books are way too vague! Many thanks.
David Blight
Exeter UK where spring is in full swing.