Evoc Bike Travel Bag Monocoque base w/ aluminum slide rails - Provides more rigidity and makes the bag more stable under heavy loads Aluminum front hand w/ clip-on swivel wheel - Aluminum handle creates a more ergonomic grip for carrying the front of the bag. When you need both hands to be free, you can clip the front swivel to the handle, for easy maneuvering without lifting the bag off the ground Better hub/rotor protection in the wheel compartments Includes Road Bike Adapter