Stoptech 227.34080R Disc Brake Rotor - Rear Right

StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotor (Part Number 227.34080R) is engineered for BMW models including the 330i, 330xi, 335d, 335i, 335is, 335i xDrive, 335xi, and X1. Designed to enhance braking performance, this rotor features a vented, slotted, and cross-drilled surface to improve heat dissipation and maintain consistent stopping power.

• Cross-drilled and slotted surface for improved heat and gas dissipation
• Vented rotor design to reduce brake fade under heavy use
• Nominal thickness of 0.862 inches (21.9 mm) with discard thickness at 0.803 inches (20.4 mm)
• Overall height of 2.646 inches (67.2 mm) and outside diameter of 13.228 inches (336 mm)
• 5 lug holes with a 4.724 inch (120 mm) bolt circle diameter
• Floating disc mounting with straight vane style for efficient cooling
• Weight approximately 18.2 lbs (8.27 kgs)

Product Line Details: StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotors

The StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to provide a balance between daily driving and spirited performance. These rotors feature a vented design combined with cross-drilled holes and slots to optimize cooling and brake pad bite. This product line is suitable for BMW drivers seeking enhanced braking response without compromising rotor longevity or fitment.

Technical Specifications and Compatibility

This disc brake rotor is vented and features a slotted and cross-drilled surface type, which helps to reduce brake fade by improving airflow and removing debris from the pad surface. The rotor has a nominal thickness of 0.862 inches (21.9 mm) and a discard thickness of 0.803 inches (20.4 mm), ensuring a clear service limit for safe operation. The overall height measures 2.646 inches (67.2 mm), and the outside diameter is 13.228 inches (336 mm). It includes 5 stud/lug holes with a diameter of 0.583 inches (14.8 mm) and a mounting bolt hole circle diameter of 4.724 inches (120 mm). The rotor mounts using a floating/dih method and features a straight vane style for effective heat dissipation. This rotor does not include an ABS tone ring or bearings.

Common Applications and Problem Solving

• Improves braking performance on BMW 330i, 335i, and X1 models
• Reduces brake fade during aggressive driving or towing
• Helps prevent rotor warping caused by excessive heat buildup
• Enhances pad bite and braking consistency in wet or dusty conditions
• Replaces worn or damaged rotors to restore factory braking feel

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (0.803 inches) before installation
• Use proper torque specifications for the 5 lug nuts on the 120 mm bolt circle
• Inspect brake pads and calipers for wear or damage during rotor replacement
• Clean rotor surface with brake cleaner before installation to remove any protective coatings
• Check for proper rotor runout and alignment to avoid vibration or uneven wear

Quality Assurance and Warranty

StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. Each rotor undergoes rigorous quality control to ensure durability and consistent performance. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.