it's likely rights only were bought by the british cycling team as spares because they come with rings normally and the right crank with rings replaced as a unit when rings were looking poor - something along those lines. or maybe the lefts strip splines from time to time. i know for sprinters on the track , octalink is still preferred over these. i think they are light and fine for the average joe, but maybe the BCT are stripping the lefts? .
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