Had a bike fall off my old rack, a Sportrack of similar design a few weeks ago. My foot is too wide for them, it forces the top part forward a bit so that it bends/bulges upward. well was i wrong, the package came i scrambled to open it up and i look at the mouse and its covered with grease and gunk/crust in all the seams of the mouse. Aunq trae algunas q no uso mucho es una excelente oportunidad para aprender a usarlas. It?s lasted me over a month. Comfortable and durable. Was perfect in helping me organize my yard tools. PRE-THREAD the screws into the plastic columns, then back them out before full assembly. My foot is rather narrow and I ordered 8M, but with the adjustable strap they fit well and are very comfortable. When I got these I was skeptical.