The Kaliente is Kenda's super lightweight race tire developed by pro racers. A supple 120 TPI casing, 125 PSI rating and their R2C rubber all combine beautifully for a fine ride quality, low-rolling resistance and increased tread life paired with amazing cornering. Plus, you get Kenda's best puncture resistant material. Iron Cloak is a layer of material under the tread that runs bead to bead. In addition to helping prevent punctures it adds strength to the sidewalls with minimal weight to the tire.