Adding on the HoldUp+2 lets you double your capacity to four bikes, each carried securely and in style. Features Carries two bikes, including mountain, road, hybrid, BMX, youth, fat-tire & E-bikes up to 50lbs./23kg each StrongArm™ hook secures bikes at the front tire, with a flip-away rear wheel strap for quick and easy loading/unloading 3-Position tilt lowers for trunk access with bikes loaded and folds flat against the car when bikes are unloaded Front wheel cradle fits up to 29" wheels, that can fold up for compact storage or vehicle access. Adjustable offset tray positions for adjusting bike to bike interference Fits 20” to 29”/700c wheel sizes and tires up to 4.8" wide Accommodates bike wheelbases from 34” to 50” Road Tested and Approved to 50lbs./23kg per bike Off-Road rated up to 33lbs. /15kg per bike RV Tested and Approved to to 33lbs. /15kg per bike Compatible with the Yakima BackSwing and StraightShot hitch accessories up to to 33lbs. /15kg per bike