Continental's Speed King is perfect for marathon racing and anywhere a light, aggressive tire is needed. It offers low rolling resistance and a secure grip with its 4mm-high lugs. The tread handles most terrain from fireroads to moist singletrack. And, the shoulder knobs dig deep for predictable handling on hardpack and loose surfaces, too. Plus, the center tread easily sheds mud so you stay in control no matter how sloppy things get.