Stoptech 128.35091L Disc Brake Rotor - Front Left

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotor 128.35091L is engineered for Mercedes-Benz models including G55 AMG, GL320, GL350, GL450, GL550, ML320, ML350, ML450, ML500, ML550, R320, R350, and R500. Designed to provide reliable braking performance, this vented, cross-drilled rotor offers enhanced heat dissipation and consistent stopping power under demanding conditions.

• Cross-drilled surface for improved heat dissipation and reduced brake fade
• Vented rotor design to maintain optimal operating temperatures
• Coated hat finish for corrosion resistance and durability
• Floating disc mounting for better rotor alignment and reduced stress
• Precision fit with 5 lug holes and 112 mm bolt circle diameter
• Compatible with multiple Mercedes-Benz SUV and performance models

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

The StopTech Sport Cross-Drilled Disc Brake Rotors line focuses on performance-oriented rotors that feature cross-drilled surfaces to enhance cooling and reduce brake fade. This product line is designed for drivers who require consistent braking performance in both daily driving and spirited conditions. The 128.35091L rotor benefits from this design philosophy, offering vented construction and a coated hat finish to resist corrosion while maintaining structural integrity.

Technical Specifications and Features

This disc brake rotor has a nominal thickness of 1.260 inches (32.000 mm) and a discard thickness of 1.157 inches (29.400 mm), ensuring a long service life before replacement is necessary. The rotor’s outside diameter measures 13.780 inches (350.000 mm), with an overall height of 2.157 inches (54.800 mm). It features a floating disc mounting system and three miscellaneous holes for improved heat dissipation. The rotor weighs approximately 28.84 lbs (13.11 kgs), balancing durability and performance. The center hole diameter is 2.638 inches (67.000 mm), and it includes five stud/lug holes with a diameter of 0.602 inches (15.300 mm) on a 112 mm (4.409 inches) bolt circle diameter.

Applications and Problem Solving

• Reduces brake fade during high-performance or heavy-duty driving
• Improves heat dissipation to prevent rotor warping and cracking
• Enhances braking consistency for Mercedes-Benz G55 AMG and GL series SUVs
• Resists corrosion with coated hat finish for extended rotor life
• Provides precise fitment for ML and R-Class Mercedes-Benz models

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness before installation
• Verify compatibility with vehicle lug pattern and bolt circle diameter
• Use proper torque specifications for mounting bolts to avoid rotor damage
• Inspect brake pads and calipers for wear during rotor replacement
• Follow manufacturer guidelines for bedding-in new rotors

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 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 consult product documentation or the manufacturer for exact warranty terms.