Maxxis Re-Fuse Dual Compound Maxx Shield Tubeless Ready Folding Bead Slick Road Bicycle Tire - 124280 Diamond knurled slick design tire bred for training and long wear life SC - Single compound casing for a durable, dependable tire MS - MaxxShield , represents the pinnacle of flat protection with 2 layers of puncture resistant belting TR - Tubeless Ready - sealant required Model Number