Hi,
I use a 172.5 Shimano Dura ace crank set on a new 54cm cannondale sys 6, I used to have them in a optimo 56cm. I feel great on my new bike however I can hit the wheel with the tip of my shoes if I have them perpendicular to the hub. usually I hit the wheel on trafic lights, no problems while riding yet. My wuestion is should i change the crank to a shorter one and then raise the seat post? I can move the cleats anymore. Im just afraid that if one day I hit that wheel while flying I'll be landing in the floor.,