The Hornit CLUG mtb has been designed for mountain bikes with tires from 44m/1.75" to 57mm / 2.23". It works with your floor to store your bike either vertically or horizontally. CLUG mounts in minutes using the screws and wall plugs provided. The mtb can be fixed on brick wall or stud only. CLUG goes by the actual tire width not the manufactures stated width, so make sure to measure your tire before buying.