First impact mu-level is set at a high-performance level. Mu-level changes with temperature. This compound reacts quickly at low temperatures while fade recovery situations are quick, consistent and exceptional.Without forceful brake pedal stroke, high performance can be attained. Developed for lots of stop-and-go driving, this compound uses a special resin material creating a soft compound that is strong and resistant against high temperatures.Ideal also for closed-course drag race situations. Non-Steel Developmental Process: A new, mild ceramic material Endless uses in certain compounds increases rotor friendliness.With no steel materials, dust is minimal and rusting is prevented, enabling ease of cleaning wheels (even without water).