I love my rollers. When we finished the basement and put in a sewing room for me there was a short hallway-type area which turned out to be a perfect place for the rollers. There is about 6 inches outside the handlebars on each side so that if I wobble or veer I can touch the wall with the handlebars or my elbows and keep on rolling. It works great. The walls do give you more confidence. Unfortunately, I used the technique of touching my elbow on the concrete wall of the golden gate bridge several years ago to avoid another cyclist while on tour and ended up leaving some skin. So I can say I left more than my heart in San Francisco .