! In western stirrups, you don't have to work so much about the ridges on the bottom getting such because the stirrup base is wide... It yeah don't recommend them for riding. I personally ride in tennis shoes a bit of the time, if you are any sort of decent rider and don't have HUGE stirrups, there really is little risk of getting stuck or slipping through a stirrup. This is just my personal opinion of course. Most of the time I rie in a pair of Justin brand work type boots, since I don't have the luxury of just walking around the barn and saddling up, I need to be able to walk and run and work in my riding boots too so slick soles are out of the question.