Stoptech 127.34093R Disc Brake Rotor - Front Right

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.34093R) are engineered for BMW models including the 335d, 335i, 335is, 335i xDrive, 335xi, and X1. These rotors provide enhanced braking performance through a vented design combined with cross-drilled and slotted surfaces.

• Cross-drilled and slotted surface for improved heat dissipation and debris removal
• Vented rotor design to reduce brake fade under heavy use
• Coated hat finish for corrosion resistance
• Floating disc mounting for better thermal expansion management
• Compatible with 5-lug bolt pattern and 13.7-inch outside diameter

Detailed Product Features and Specifications

This disc brake rotor features a nominal thickness of 1.177 inches (29.9 mm) and a discard thickness of 1.118 inches (28.4 mm), ensuring a durable lifespan before replacement is necessary. The rotor's overall height measures 2.886 inches (73.3 mm), with a center hole diameter of 3.106 inches (78.9 mm) and a mounting bolt hole circle diameter of 4.724 inches (120 mm). The rotor is vented with straight vanes to optimize airflow and cooling during braking. The surface type is slotted and drilled, which helps to maintain consistent brake pad contact and reduce gas buildup. The rotor weighs approximately 24.2 lbs (11 kg), balancing strength and weight for performance applications.

About StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to enhance braking efficiency and thermal management for performance-oriented vehicles. This product line combines cross-drilled holes and precision slots to improve pad bite and reduce brake fade, making it suitable for spirited driving and track use. The rotors are vented and feature a coated hat finish to resist corrosion, extending service life while maintaining consistent braking performance.

Applications and Problem Solving

• Reduces brake fade during aggressive driving or towing
• Improves heat dissipation to prevent rotor warping
• Minimizes brake dust and debris buildup on rotor surface
• Enhances wet weather braking by channeling water away
• Maintains consistent brake pad contact for smoother stops

Installation Notes and Tips

These rotors are designed for direct replacement on compatible BMW models listed. Ensure the rotor thickness is above the discard thickness before installation. The floating disc mounting requires proper alignment to allow for thermal expansion. It is recommended to inspect brake pads and hardware during installation and replace if worn. No bearings or ABS tone rings are included with this rotor, so existing components must be reused or replaced separately as needed.

Quality Assurance and Warranty

StopTech rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The coated hat finish provides corrosion resistance to extend rotor life. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Always verify warranty terms with the product documentation or manufacturer.