Back in the old day, when pedals could be disassembled, it was common to switch pedal axles to allow the reversing of the captain's cranks (and the stokers left crank) on tandems. As several have mentioned, Loctite is useful but not essential if the pedals are properly tightened. More recently I learned that a very experienced tandem owner I know simply re-taps the threads in his cranks so that he has a broader choice of options for his cranksets. Of course, cutting a right-hand thread over a left-hand thread does not leave much metal so over tightening becomes a concern. But this rider probably has accumulated as many tandem miles as anyone on this thread (pun intended) with this usual approach.
Last edited by MikeAndJean; 01-06-21 at 12:55 PM.