Later models in the series include the Specialized CruX Expert Carbon and Specialized CruX Pro Carbon, which use higher end components and carbon frames. This bike has an E5 alloy frame built for cross racing and an integrated headset for tough and quick action. The top tube is shaped for easier shouldering when carrying it around. A FACT carbon fork with tapered steerer provides stiff and responsive steering that still manages a smooth ride over rougher terrain. The Bulletproof Pavé wheelset is designed to power through dirt and take heavy punishment with the sturdy alloy rims.