Stoptech 128.35091R Disc Brake Rotor - Front Right

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotors (Part Number 128.35091R) are engineered for Mercedes-Benz models including G55 AMG, GL320, GL350, GL450, GL550, ML320, ML350, ML450, ML500, ML550, R320, R350, and R500. These rotors provide reliable braking performance with a vented, cross-drilled design to enhance heat dissipation and maintain consistent stopping power.

• Cross-drilled surface for improved heat dissipation and reduced brake fade
• Vented rotor design to optimize cooling during heavy braking
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for better rotor alignment and reduced stress
• Compatible with 5-lug wheel setups with a 112 mm bolt circle diameter
• Nominal thickness of 1.260 inches (32.000 mm) with discard thickness at 1.157 inches (29.400 mm)
• Overall diameter of 13.780 inches (350.000 mm) and overall height of 2.157 inches (54.800 mm)

Detailed Product Description

The StopTech Sport Cross-Drilled Disc Brake Rotors are designed specifically for select Mercedes-Benz SUVs and performance models. Featuring a vented rotor construction with straight vanes, these rotors improve airflow to reduce heat buildup during aggressive driving or towing. The cross-drilled surface pattern helps to evacuate gases and debris from the braking surface, maintaining consistent pad contact and reducing brake fade. The coated hat finish protects the rotor center from rust and corrosion, ensuring durability over time. This rotor uses a floating disc mounting system, which allows slight movement between the rotor and hub to reduce stress and improve braking smoothness. With a 5-lug, 112 mm bolt circle diameter and a center hole diameter of 2.638 inches (67.000 mm), it fits securely on compatible Mercedes-Benz models.

StopTech Sport Cross-Drilled Disc Brake Rotors Product Line

The StopTech Sport Cross-Drilled Disc Brake Rotors line focuses on performance-oriented rotors that balance heat management and durability. This product line is engineered to provide enhanced braking performance for street and light track use, making it suitable for Mercedes-Benz vehicles that demand reliable stopping power under varied driving conditions. The cross-drilled design is a key feature of this line, aimed at improving rotor cooling and brake pad bite without compromising rotor strength.

Common Applications and Problem Solving

• Reduces brake fade during extended or aggressive braking
• Improves heat dissipation to prevent rotor warping
• Minimizes corrosion on rotor hats with coated finish
• Enhances braking consistency for Mercedes-Benz G55 AMG and GL series models
• Addresses uneven pad wear caused by overheating

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (1.157 inches) before installation
• Verify compatibility with vehicle’s 5-lug, 112 mm bolt pattern
• Use proper torque specifications for mounting bolts to avoid rotor distortion
• Inspect brake pads and calipers during installation for optimal performance
• Break in new rotors according to manufacturer recommendations to ensure proper bedding

Quality Assurance and Warranty

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