SwissStop Catalyst disc rotors deliver consistent brake torque over long durations where others experience gradual decline and brake fade. Due to extremely efficient thermal management, Catalyst provides notably shorter stopping distances with very low wear rates under hard braking, exceeding the current industry leaders.Optimum heat dissipation for maximum braking endurance and shortest stopping distances Reliable performance from cyclocross to downhillHigh durability, even in he toughest conditionsLightweight 7075-T6 aluminium spiderHighly efficient SUS410 stainless steel brake trackUCI approved for use in road competition6 bolt fitment110-198g