The Hornit Clug is designed for mountain bikes with tires ranging from 44 mm (1.75") to 57 mm (2.25"). It works with your floor to store your bike either vertically or horizontally. Clug can be installed in just a few minutes using the included screws and anchors. The Hornit Clug can only be mounted on a wall or a stand. If your tire falls within the range of 44 mm to 57 mm (1.75"-2.25"), you should choose the Clug. The Clug, awarded the Eurobike prize, is the smallest bike rack in the world. This wall-mounted bike storage solution works with your floor to store your bike vertically or horizontally. You won't believe something so small can work so well, but it does. You simply roll your bike up and place it into the Clug. It's like a hug for your bike. The Clug is available in five sizes from 23 mm to 81 mm and can be installed in just a few minutes with the included screws and anchors. It truly is the simplest and cleanest way to store your bike.