Originally Posted by
JohnDThompson
True, but his crank arms may well be metric thread, and I'm not aware of any clipless pedal available with metric thread. The arms could be re-tapped to ISO thread (easy with aluminum arms, not so easy with steel arms), or the arms could be replaced with a cotterless crank and appropriate spindle or bottom bracket.
That the arms are French threaded has been established... It wasn't mentioned in the OP that being the case.