We have researched the correct rotor temperature ranges for the spirited street driver. The rotor temperature range for this compound is wide and mu-level is consistently stable.Thus, brake pedal force does not change considerably at different rotor temperature ranges and braking performance levels maintain consistency on the street given most situations.This is a very controllable compound that is set at a high mu-level. After fade, recovery is achieved while brake performance does not worsen, returning to the mu-levels achieved before fade, right away.Part of the Non-Steel Series, Endless uses a Non-Steel Developmental Process using a new, mild ceramic material to increase rotor friendliness.With no steel materials, dust is minimal and rusting is prevented, enabling ease of cleaning wheels (even with water).