Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
Wilwood supplies this left TX4R brake caliper with an anodized finish. Its 9.63-inch mounting span and 1.25-inch-wide rotor configuration are key checks when selecting a single caliper for an existing system. Calipers, brake rotors, master cylinders, valves, fittings and brake lines are among the disc brake components designed and manufactured by Wilwood Engineering. Bill Wood founded the company in 1977; it is based in Camarillo, California. The range serves motorsport, street-performance and specialized systems, with component selection determined by the full brake arrangement. The forged TX4R is a four-piston radial caliper intended for heavy vehicle brake assemblies. This exact 1.25-inch nominal-width unit differs from wider TX4R variants. Match the 10120 pad shape, bracket offset and available wheel space rather than relying on the family application summary.
Technical Details
- Manufacturer part number: 120-16731
- Component: TX4R Forged Radial Mount; one individual caliper
- Placement: Left
- Construction and finish: Forged aluminum; Type III Anodize
- Nominal rotor width: 1.25 inches
- Rotor width range: 1.17–1.25 inches
- Rotor diameter range: 14.25–16.00 inches
- Caliper weight reference: 13.4 lb
- Mounting interface: Radial; mounting centers 9.63 inches
- Mount height: 3.07 inches
- Hydraulic inlet thread: 1/8-27 NPT
- Pistons: 4; stainless steel; bore dimensions 1.62/1.38 inches
- Hydraulic piston area: 3.56 square inches
- Dust boots: Yes
- Brake pad shape: 10120; shape number does not specify a friction compound
Fitment & Compatibility
Match the 9.63-inch radial attachment to the existing bracket, then check caliper centering over the 1.25-inch nominal-width rotor. Use the left-hand caliper and keep the bleed arrangement in the specified orientation. The 1/8-27 NPT connection must use the correct fitting and seal. Check the full wheel envelope with the actual bracket and rotor installed.
Wilwood caliper specifications
Contact PMB Performance for a component comparison using the actual caliper, bracket and rotor measurements. Our team has over 20 years of experience with parts and fitment details.
