DuraGo BR900724 Disc Brake Rotor - Front

Durable Disc Brake Rotor for BMW 135i and 135is

The DuraGo BR900724 disc brake rotor is engineered for reliable braking performance on BMW 135i and 135is models. Designed with a composite construction, this rotor combines a cast iron braking surface with an aluminum hat for balanced strength and weight.

• Composite construction with cast iron friction surface and aluminum hat
• Vented rotor design for improved heat dissipation
• Nominal thickness of 1.02 inches (26 mm) with discard thickness at 0.96 inches (24.4 mm)
• Overall diameter of 13.31 inches (338 mm) and height of 2.87 inches (73 mm)
• Five mounting bolt holes with a 4.72 inch (120 mm) bolt circle diameter
• Non-directional brake surface for versatile installation
• Conventional drum-in-hat type rotor without ABS tone ring

Technical Details and Construction

The BR900724 rotor features a composite design that pairs a durable cast iron braking surface with a lightweight aluminum hat, reducing unsprung weight and improving vehicle handling. Its vented construction enhances cooling by allowing air to flow between the rotor faces, which helps prevent brake fade during extended use. The rotor measures 13.31 inches (338 mm) in outside diameter and 2.87 inches (73 mm) in overall height, fitting precisely on BMW 135i and 135is models. The nominal thickness is 1.02 inches (26 mm), with a discard thickness of 0.96 inches (24.4 mm), indicating when replacement is necessary to maintain safe braking performance.

Compatible Vehicles and Applications

This DuraGo disc brake rotor is compatible with BMW 135i and 135is vehicles, providing a direct replacement for worn or damaged rotors. It is designed for drivers seeking a reliable rotor that meets OEM specifications without additional features like cross-drilling or slotted surfaces. The non-directional brake surface allows for flexible installation without concern for rotor orientation.

• Replaces worn or warped rotors causing vibration or noise
• Addresses reduced braking efficiency due to rotor thinning
• Eliminates brake pulsation from uneven rotor surfaces
• Restores proper rotor dimensions for safe braking

Installation Notes and Tips

When installing the DuraGo BR900724 rotor, ensure the mounting surface is clean and free of rust or debris to promote proper fitment. Use the correct torque specifications for the five mounting bolts on the 4.72 inch (120 mm) bolt circle diameter. Since this rotor does not include an ABS tone ring, verify compatibility with your vehicle’s ABS system before installation. It is recommended to replace brake pads simultaneously to ensure optimal braking performance.

Quality Assurance and Warranty

DuraGo manufactures this rotor to meet or exceed OEM standards for fit, form, and function. The composite construction and vented design contribute to consistent braking performance and durability. While specific warranty details are not provided, DuraGo products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.