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@TheFinalHour
They are just as bogus as the P.M.P. cranks but a lot better looking. They supposedly increase the pedal's propulsion power becayse of the longer arm. However, the only arm that matters is the virtual one that runs from the centre of the bottom bracket spindle to the centre of the pedal, regardless of the shape of the piece of metal that connects these two.
edit: these are the P.M.P. cranks:
