Wilwood 120-16730 Tactical Xtreme Radial Mount Disc Brake Caliper - TX4R 4-Piston

The Wilwood Tactical Xtreme TX4R (Part No. 120-16730) is a heavy-duty radial mount four-piston disc brake caliper engineered for severe-duty service. Designed specifically for heavy-duty trucks, SUVs, and Class 1, 2, and 3 armored vehicles with a GVWR up to 14,000 lbs., this caliper delivers the stopping performance and durability demanded by the most demanding applications.

The TX4R features a stress-flow forged aluminum body that keeps weight low while maintaining structural integrity under extreme braking loads. Stainless steel pistons paired with high-temperature internal bore seals ensure consistent performance and long service life in severe operating environments.

Key Features:

• Radial mount design — versatile and easily adapted to a wide range of vehicle platforms
• Stress-flow forged aluminum 6-piston body — high strength with reduced unsprung weight
• Stainless steel pistons with high-temp internal bore seals for heat resistance and durability
• Compatible with rotors 14.25" to 16.00" in diameter and rotor widths from 1.38" to 1.50"
• Top-loaded pad design (Type 10120) — easy pad access and replacement without caliper removal
• Pad thickness: .770" with rigid .240" thick backing plates
• Stainless steel bridge plates for added rigidity and corrosion resistance
• Protected single bleed design with internal fluid ports to minimize contamination risk
• Rated for vehicles up to 14,000 lbs. GVWR — Class 1, 2, and 3 armored and tactical vehicles

The Wilwood TX4R is purpose-built where standard calipers fall short — delivering reliable, fade-resistant braking for military, law enforcement, and commercial heavy-duty truck and SUV applications.