Named after Portland's Cross Crusade Cyclocross series, Clement's Crusade PDX is an all-around mud-wrestler, the tire you want on your ride when things get sloppy. This tire shines in the mud and chaos of 'cross with an aggressive tread and tall shoulder knobs so your bike stays controlled in the turns. Out of the muck, aligned center knobs give speed on pavement and hard pack. There's simply no comparison to a high-quality tubular tire, and the PDX offers an unmatched ride, with supple sidewalls, lower tire pressures, and reinforced sidewalls to prevent flats. The removable valve core lets you easily add the tire sealant of your choice.