GPFAX Sintered Road Race Brake Pads are for RACE ONLY use. This is a blend of brake pad that has higher friction and far better grip than any other brake product on the market. GPFAX Sintered Road Race Brake Pads have by far the highest known friction with a measurement between 0.6 and 0.7 and deliver the most amazing brake effect. Because of this factor, they are unsuitable for street use or for road tires. Zero brake fade is guaranteed and the heat stability of these brake pads is perfect, leaving the racer with high confidence and a product that can be used over numerous races. Highest performance friction level known. Guaranteed for lifetime performance.