GPFAX Sintered 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 tyres. 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. GPFAX Sintered Race brake pads are a closed circuit use pad only and street/highway riding with this material is highly inadvisable and dangerous. Such high friction levels as delivered by these pads are for ideal track conditions with race tyres or slicks on prepared asphalt surfaces and NOT for use with highway tires or on the highway. This material is not ECE R 90 approved nor TUV tested with a German ABE and use on the highway is therefore illegal in many countries.