I am using Shimano M-520 or M-540 pedals and have noticed that I'm able to swing my heel about 4" from inside to just before release. At times, if I don't pay attenting, my left heel even scrapes the crank arm. It seems to be more than I remember.

I know how to adjust release tension. Does this also effect float?

Is there a separate float adjustment? I checked the on-line tech documents and float isn't mentioned.

Could the excessive float be because my clips/cleats have worn out? How do you tell if they are worn out?

Any input would be appreciated.