Caliper XRZ4R Radial Mnt 1.88 / 1.75 .810 L/H

The Wilwood Caliper XRZ4R Radial Mount Left-Hand brake caliper is a high-performance single-piston design engineered for precision stopping power in demanding driving environments. Built to accommodate 14.000-inch outside diameter rotors with 0.900-inch thickness, this left-hand driver-side caliper delivers repeatable, fade-resistant braking performance across extended duty cycles. The aluminum construction with gray anodized finish provides corrosion resistance and weight efficiency, critical factors for vehicles operating in harsh field conditions or extended off-road scenarios.

The 5.98-inch radial mount design integrates with standard mounting brackets, allowing for straightforward installation on compatible brake systems. The XRZ4R series is engineered for consistent modulation and reduced brake fade under sustained thermal load—essential characteristics for tactical vehicles, pursuit units, and specialty applications where braking reliability directly impacts mission success. Weighing 5.5 pounds, this single caliper maintains a compact footprint without compromising structural rigidity or thermal dissipation capacity. The 1.88-inch and 1.75-inch bore dimensions, paired with the 0.810-inch left-hand configuration, ensure proper pad wear geometry and force distribution across the rotor surface.

This caliper suits operators and technicians rebuilding or upgrading brake systems on vehicles designed for high-performance or specialized duty. Whether replacing worn factory equipment or building a custom brake package, the XRZ4R delivers the stopping precision and durability expected from Wilwood's professional-grade brake components. Compatibility verification with your specific vehicle platform and brake configuration is essential before ordering—mount type, rotor dimensions, and pad material must align with your system specifications.

Wilwood calipers are established within motorsport, law enforcement fleet maintenance, and specialty vehicle communities as dependable solutions for systems requiring fade-resistant performance and long service life. The XRZ4R's radial mount design simplifies integration into platforms where traditional fixed-mount calipers may create packaging conflicts.