SportRack ABR611 Nomad Universal Upright rack Sturdy, well-built car-top bike rack Mounts directly to all OEM or aftermarket crossbars up to a maximum 3.5-inch bar diameter with included universal U-bolts Accepts bikes with frames from one-to-two inches in diameter Adjustable locking cam system with interchangeable lock core keeps your ride secure Large, overlapping jaw further boosts security