What makes the Shimano P03A-RF resin pad good for long descents?

The Shimano P03A-RF Disc Brake Pad and Spring is a finned resin pad built to keep braking quiet and fade-free on long, steep descents. The aluminum radiator fin pulls heat out of the pad and caliper, so power stays consistent when you are dragging the brakes through a sustained downhill. The third-generation resin compound delivers low noise and smooth modulation, giving you fine control over how hard you bite.

This is the narrow P-type pad shape for Shimano four-piston calipers, and it fits the XTR BR-M9220 and XT BR-M8220 brakes. It ships as one pair with the pad spring, ready to drop in. Best for the trail and enduro rider running current four-piston XTR or XT brakes who wants the heat management of finned pads with the quiet, controlled feel of resin.