I have no idea how to describe the spindle interface,so I don't know if this will work for you. I have a spare 2013 Shimano Ultegra 6700 left crank (got hit by a car and bent the right one).
A forum community dedicated to Road Bike owners and enthusiasts. Come join the discussion about bike parts, components, deals, performance, modifications, classifieds, troubleshooting, maintenance, and more!