You are correct about the sneakers having a thicker and wider heels. My other walking shoes with narrower heels did not hit the side of the bike as much. I think my problem is my toes points outward. I normally walk that way. I have been reading the posts in this forum about similar problems. Suggestions were getting pedal axle extension, speedplay pedals. I have ordered the pedal axle extensions and will try them first and will look at the speedplay pedals next. Thanks for your posts.