Utilizing RockyMounts premium 3-axis anti wobble system; Allows BackStage, MonoRail, and SplitRail racks to fold flat against vehicles with spare tires. Works well for bike racks including Thule, Yakima & Kuat. Product Features: - Extends rack 8 inches from receiver - Only for 2-inch hitch receivers - Uses RockyMounts 3-axis anti wobble system - Reduces vehicle hitch capacity by 50% - Ideal for vehicles with spare tires, recessed hitches or van doors - Includes locking hitch pin with premium lock pod, can be keyed alike - 10lbs