TIOGA FASTR REACT - S-Spec tyres share the same state-of-the-art tread features as the FASTR, the FASTR REACT adds distinctive rows of serrated shoulder knobs designed to further Š—“lockin the tire in place at the starting gate so as the gate drops, the knobs instantly engages, launching you out of the gate with less wasted energy. React faster out of the gate with the FASTR REACT from Tioga, the leader in BMX tyre technology. The Tioga React BLK LBL can be run all the way up to 110psi