I presume English
There are at least 3 different BB threadings which could be called "English" :-)
Forts are 1.370"×24tpi BSC, LH thread on drive side, RH thread on NDS, 68mm shell width for road/track.
@gbj_tester started
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There are at least 3 different BB threadings which could be called "English" :-)
Forts are 1.370"×24tpi BSC, LH thread on drive side, RH thread on NDS, 68mm shell width for road/track.