PLEASE BE CAREFUL WHEN SELECTING YOUR PEDAL SIZE: These 9/16" spindle pedals only fit three-piece crank sets; the left crank arm may be taken off by itself. YOU WOULD NEED THE 1/2" SIZE PEDALS WHICH ARE AVAILABLE IN OUR EBAY STORE IF YOU HAVE A SINGLE PIECE CRANKSET (i.e., the two crank arms are made of a single piece of metal and you cannot remove the left crank arm alone).