Designed by the legendary Ned Overend, Specialized's The Captain Grid UST Tire is perfect for shredding any cross-country course. Its dual-compound tread features firm, fast-rolling center knobs and soft, grippy side knobs for exceptional bite in the corners. What's more, The Captain utilizes Specialized's Grid UST technology that gives you all the advantages of a tubeless system like lower pressures, reduced pinch flats and improved grip without the added heft.
Universal Standard for Tubeless (UST) tires are compatible with UST tubeless and standard rims. When used with UST tubeless rims, the tire and rim form an airtight chamber, allowing the tire to be inflated without a tube. When used with standard rims, a tubeless kit and sealant (sold separately) can be added to the rims to create an airtight seal. Both rim setups let you run lower tire pressure for optimum traction and control without fear of pinch flats. And, UST tires can be mounted and inflated with a tube on both UST tubeless and standard rims.