Sharing some of the same state of the art features as the Fastr S-spec, the Fastr React further improves that unique tread pattern. Adding distinctive rows of paddle like serrated shoulder treads that are designed to better "lockdown" the tyre during hard acceleration to more efficiently transfer that power from each pedal stroke. The Black Label series adds AvntGUARD, a special bead-to-bead membrane applied within the casing for enhanced cut and abrasion protection while retaining the tyre's buttery smooth suppleness. Max pressure rating: 110 psi ###section### Product Specs WHEEL SIZE: 20" MAX PRESSURE: 110 PSI WEIGHT:  20" x 1.6" - 320g (11.2oz) 20" x 1.75" - 345g (12.1oz) PACK SIZE: Single