I needed a bike rack that would hold my bike's extra wide handlebars and this one fits. The parts of the hook that can support two bikes are 12 inches and 18 inches from the wall when installed. This means the two bikes will be just six inches apart. Not sure how well this will work, but since I needed a full 18" clearance from the wall, this worked for me with just one bike. Others have found the included screws to attach to the wall feel inadequate. I agree. I replaced the screws with something longer and heavier. I would recommend others to do the same. Another nice feature of this design is that it folds away when not in use. It's very easy to fold it against the wall, and the support arm is a solid one-piece piece that easily supports the weight of my relatively heavy (40lb) bike. Works well for two smaller ones. It was exactly what I needed for a larger-than-average, heavy-than-average bike.