WTB Thickslick Tire. Features: No-nonsense, slick design provides optimal traction on rough streets. Thick rubber casing protects against damage from glass, pins, staples, and other urban unpleasantries. Twice the rubber makes for a smoother ride through the natural absorption qualities of the material. Flat Guard tires have Urban Armor Casing, which utilizes and additional layer of rubber throughout the casing, sidewall and under the tread. Specifications: Tire Type: Clincher Bead: Wire Compound | Casing: Rubber | Urban Armor TPI (Threads Per Inch): 27 TPI Puncture Protection: Tread Inflation: 100 PSI Max Color: Black Weight: -