DuraGo BR31150 Disc Brake Rotor - Rear

Overview of DuraGo BR31150 Disc Brake Rotor

The DuraGo BR31150 is a solid disc brake rotor designed specifically for Mazda Millenia models. Crafted from durable cast iron, this rotor provides reliable braking performance and consistent wear characteristics for your vehicle.

• Material: Cast iron for strength and heat dissipation
• Construction: Full cast solid rotor with drum-in-hat design
• Outside Diameter: 11.25 inches (285.7 mm)
• Nominal Thickness: 0.37 inches (9.5 mm)
• Mounting Bolt Hole Quantity: 5 with 4.5 inch (114.3 mm) bolt circle diameter
• Center Hole Diameter: 2.83 inches (72 mm)
• Non-directional brake surface for versatile installation
• Overall Height: 2.24 inches (57 mm)
• No ABS tone ring included

Detailed Product Description

The DuraGo BR31150 disc brake rotor is engineered with a full cast solid construction, ensuring structural integrity and consistent braking performance. Its cast iron material offers effective heat dissipation, which helps reduce brake fade during extended use. The rotor features a drum-in-hat design, integrating the parking brake drum within the rotor assembly, which is common for certain Mazda Millenia brake systems. This rotor is non-directional, allowing for flexible installation without concern for rotation direction. The 5-bolt mounting pattern with a 4.5-inch bolt circle diameter matches the factory specifications for Mazda Millenia vehicles, ensuring proper fitment and secure attachment.

Compatible Vehicles and Applications

This rotor is compatible with Mazda Millenia models requiring a 285.7 mm (11.25 inch) outside diameter disc brake rotor with a drum-in-hat design. The part number BR31150 corresponds directly to this fitment, making it a suitable replacement for maintaining factory braking performance.

• Eliminates rotor warping and vibration issues
• Addresses uneven brake pad wear caused by worn rotors
• Resolves brake noise related to rotor surface imperfections
• Restores proper braking response and pedal feel
• Supports parking brake functionality with integrated drum-in-hat design

Installation Notes and Tips

When installing the DuraGo BR31150 rotor, ensure the mounting surface is clean and free of rust or debris to promote proper seating. Verify the rotor thickness before installation; the nominal thickness is 0.37 inches (9.5 mm), and the discard thickness is 0.3 inches (7.5 mm). Replace the rotor if it is below the discard thickness to maintain safe braking performance. Since this rotor does not include an ABS tone ring, confirm compatibility with your vehicle’s ABS system. Proper torque specifications should be followed for the 5 mounting bolts to avoid rotor distortion.

Quality Assurance and Warranty

DuraGo manufactures the BR31150 rotor to meet or exceed OEM standards for fit, form, and function. The cast iron construction and full cast design contribute to durability and consistent braking performance. While specific warranty details are not provided, DuraGo products typically come with a limited warranty against defects in materials and workmanship. It is recommended to consult the product documentation or supplier for exact warranty terms.