I think a clipless pedal helps a lot by being less "thick" and lower at the edge. I don't find that my crank limits my cornering at all, even though I ride a 170 on a conversion. It does cause trouble when I overtake cars on the right... can't get the pedal over the curb because it would certainly hit. With a coastie, I'd have 5 extra inches of road to use. Oh well...