I just bought the Speedplay Frogs for my mid-70's Bob Jackson road bike. Tried to install them yesterday but the pedal thread size on the Stronglight crank arms (made in France) is smaller than the Speedplays. Short of buying new crank arms, is there anything I can do? I knew I should've bought a new bike and not an older bike. But I just love hand-made frames made from Reynolds 531. Oh well.
May have to have the French crank arms re threaded to the other side of the channel fractional
9/16" rather than 14mm.. even the French finally adopted the English fractional standard
since the rest of the world , the market, has already gone over.