Wilwood Front Brake Kit for Triumph TR4A/TR250/TR6 with Red Dynalite Calipers, 11-Inch SRP Rotors and Braided Hoses (Listed 1965–1976 Applications)

Red Dynalite four-piston calipers work over 11.00-inch SRP rotor rings in this Triumph conversion. Supplied aluminum hats retain the documented original-hub mounting, and the brake package includes BP-10 pads and 15-inch braided flexlines. The individual TR4A, TR250 and TR6 ranges must be matched to the car. Wheel clearance still depends on spoke and barrel shape, including when using the supported wire-wheel arrangement. Wilwood Engineering, founded by Bill Wood in 1977, designs and manufactures disc brake systems from its Camarillo, California base. Motorsport, street-performance and specialized applications use its calipers, rotors, master cylinders, valves, fittings and brake lines. Correct component selection depends on the requirements of the entire braking system.

Technical Details

• Manufacturer part number: 140-15912-DR. Quantity: one kit for the stated axle/application.
• Rotor specification: 11.00-inch outside diameter × 0.81-inch thickness; SRP drilled & slotted faces. Iron construction; SRP Drilled Rotor design; published vane configuration: 30 V.
• Service caliper: Forged Dynalite Internal; 4 pistons; stainless piston material. Lug mounting, red powder coat finish.
• Rotor hats: aluminum, black e-coat finish; Big Brake Hat - Short Offset. Hat offset: 0.725 inch.
• No replacement wheel hubs are supplied; retain or provide the documented matching hub arrangement.
• Wheel mounting pattern: 4 x 4.00 inches.
• Published piston bores: 1.62, 1.62 inches. Supplied pad compound: BP-10.
• Caliper hydraulic inlet: 1/8-27 NPT.
• Included braided flexline kit: 220-15921 (15.00 in). Confirm the chassis fitting and routing for the actual installation.
• Minimum nominal wheel diameter: 15 inches. The wheel must also clear the actual caliper and rotor profile in the installation drawing.
• Mounting hardware and the specified pads are included. Spindles, master cylinder and brake booster are not supplied.

Fitment & Compatibility

Listed Triumph applications are TR4A 1965–1968, TR250 1967–1969 and TR6 1968–1976. Match the exact model row rather than merging these into a blanket year range. The conversion bolts to the documented original spindle, retains the original hubs and supports the specified wire-wheel knock-off mounts without changing track width. Check the 15-inch wheel drawing and use the supplied flexlines with suitable routing and chassis connections. Use the complete application table below for the individual year, submodel, brake configuration and note attached to each entry.

Ask PMB Performance to review the brake configuration if the vehicle has been modified. Our 20+ years of parts and fitment experience help identify the axle, spindle and wheel details that need to match before the kit is selected.

Manufacturer documentation: Installation instructions.

Manufacturer Warning

Applicable to brake pads only: Wilwood warns of exposure to arsenic, cadmium, hexavalent chromium compounds, lead, nickel, cobalt and antimony trioxide, chemicals known to California to cause cancer or reproductive harm. More information: P65Warnings.ca.gov.