The SL4 features a robust wheel cradle mounting system designed to securely hold up to 4 bikes by their front wheels, eliminating the need for frame clamps or complicated straps. Each cradle is engineered to provide a snug, stable fit, preventing movement and ensuring your bikes stay firmly in place, even on the roughest terrain. This system not only protects your bike frames from scratches and damage but also simplifies loading and unloading, making it faster and safer to get your bikes out of the garage!