Brake Pad XRZ4R Poly H 10420 Pad Shape

The Wilwood Brake Pad XRZ4R PolyMatrix H Compound (Part No. 15H-16502K) is a high-temperature racing brake pad engineered for extreme friction demands and sustained thermal cycling. Designed specifically for Wilwood XRZ4R calipers, this pad set delivers consistent stopping power under the severe conditions encountered in track environments, towing operations, and high-performance off-road recovery scenarios where brake fade must be minimized.

The PolyMatrix H compound offers high friction coefficient with minimal fade characteristics across a broad temperature range. This formulation is engineered to withstand repeated hard braking cycles without degradation, a critical requirement for heavy vehicles under load or performance applications requiring multiple emergency stops in succession. The pad geometry is optimized for Wilwood XRZ4R caliper compatibility, ensuring proper seating, even pressure distribution, and predictable modulation during both gradual deceleration and threshold braking events.

This brake pad kit serves operators, fleet managers, off-road enthusiasts, and motorsport users who prioritize stopping consistency over temperature extremes. Whether managing a loaded tow vehicle on mountain descents, executing repeated hard stops during tactical or law enforcement training, or maintaining brake integrity during extended track sessions, the PolyMatrix H compound bridges the gap between street durability and full-race performance. Proper pad selection directly impacts braking system longevity and prevents thermal degradation of rotors and fluid—making the correct compound choice essential for mission-critical or high-utilization vehicles.