Stoptech 128.35090R Disc Brake Rotor - Rear Right

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotor (Part Number 128.35090R) is engineered for Mercedes-Benz models including GL320, GL450, ML320, ML350, ML450, ML500, ML550, R320, R350, and R500. Designed to provide reliable braking performance, this rotor features a solid, cross-drilled surface and a coated hat finish for durability.

• Cross-drilled solid disc brake rotor for improved heat dissipation
• Coated hat finish to resist corrosion and extend rotor life
• Nominal thickness of 0.551 inches (14.000 mm) with discard thickness at 0.449 inches (11.400 mm)
• Overall height of 2.476 inches (62.900 mm) and outside diameter of 12.992 inches (330.000 mm)
• Five lug holes with a bolt circle diameter of 4.409 inches (112.000 mm)
• Center hole diameter of 2.638 inches (67.000 mm) for precise fitment
• Solid rotor design without ABS tone ring included
• Weight approximately 17.5 lbs (7.95 kgs)

About StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotors line is designed to enhance braking performance through improved heat management and consistent pad contact. The cross-drilled surface helps reduce brake fade by allowing gases and heat to escape more efficiently during heavy braking. The solid rotor construction provides a stable braking surface, while the coated hat finish protects against rust and corrosion, making it suitable for daily driving and spirited use on compatible Mercedes-Benz vehicles.

Detailed Product Description

This StopTech rotor (128.35090R) is a solid disc brake rotor featuring a cross-drilled surface type that aids in heat dissipation and brake pad cleaning. The rotor’s nominal thickness is 0.551 inches (14.000 mm), with a discard thickness of 0.449 inches (11.400 mm), ensuring a clear service life indicator. The overall height measures 2.476 inches (62.900 mm), and the outside diameter is 12.992 inches (330.000 mm), matching the specifications required for Mercedes-Benz GL and ML series models as well as R-Class variants. The rotor includes five lug holes with a 4.409-inch (112.000 mm) bolt circle diameter and a center hole diameter of 2.638 inches (67.000 mm), ensuring proper alignment and fitment. This rotor does not include an ABS tone ring or bearings, so it is intended for vehicles where these components are separate or already installed.

Applications and Problem Solving

• Compatible with Mercedes-Benz GL320, GL450, ML320, ML350, ML450, ML500, ML550, R320, R350, and R500 models
• Addresses brake fade caused by excessive heat during aggressive driving or towing
• Helps reduce rotor warping and uneven pad wear through improved heat dissipation
• Prevents corrosion on the rotor hat area with a protective coating
• Suitable replacement for worn or damaged factory rotors to restore braking performance

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness before installation
• Clean rotor surface with brake cleaner to remove any protective oils before mounting
• Verify bolt pattern and center hole diameter match vehicle hub specifications
• Torque lug nuts to manufacturer specifications to avoid rotor distortion
• Check compatibility with existing brake pads and calipers on Mercedes-Benz GL and ML series or R-Class vehicles

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The coated hat finish provides additional 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. It is recommended to consult the product documentation or manufacturer for exact warranty terms.