Stoptech 128.44139R Disc Brake Rotor - Front Right

StopTech X-Drilled Front Right Rotor

The StopTech Sport Cross-Drilled Disc Brake Rotor, part number 128.44139R, is a direct replacement front right rotor for factory brake systems and stock calipers. It is built for drivers who want improved brake response, cleaner heat management, and a finished look behind the wheel.

Compatible With Lexus IS250 front right applications from 2010-2015 and Lexus GS300 front right applications for 2006. This rotor also fits the 2009 Lexus IS250 front right with front caliper casting #60-32.

Key Features

• Cross-drilled surface helps move heat and brake dust away from the braking surface
• Vented rotor design supports consistent braking under repeated stops
• Black e-coating helps protect exposed areas from corrosion
• High-carbon metallurgy is used in most applications for quieter operation and improved crack resistance
• Direct replacement fit for factory brake systems and stock calipers
• 5-lug rotor with 114.3 mm bolt circle, 62.0 mm center hole, and straight vane construction
• Part number 128.44139R for front right fitment

Product Details

StopTech Sport Cross-Drilled Disc Brake Rotors are engineered as one-piece replacement brake discs for select Lexus applications. The X-drilled surface increases bite, helps reduce pad glazing, and supports wet and dry braking consistency. Measured specifications include an 11.646-inch outside diameter, 1.181-inch discard thickness, 1.260-inch nominal thickness, and 2.000-inch overall height. The coated hat finish adds corrosion resistance, while the floating disc mounting and straight vane layout support stable operation in everyday driving.

The StopTech Sport Cross-Drilled Disc Brake Rotors line focuses on direct-fit brake upgrades that retain stock calipers while improving thermal control and pedal feel. For Lexus IS250 and Lexus GS300 owners, part number 128.44139R provides a fitment-specific solution for the front right position without requiring a brake system conversion.

Common Brake Issues This Rotor Can Address

• Brake fade during repeated stops
• Uneven pad glazing on the rotor surface
• Excess brake dust buildup on the braking face
• Corrosion on exposed rotor surfaces
• Reduced initial bite in wet or dry conditions

Installation Notes

Install on the front right position only for the listed Lexus applications. Verify rotor dimensions, hub fitment, and caliper clearance before installation. This rotor is for stock brake systems and stock calipers; confirm the 2009 Lexus IS250 front caliper casting #60-32 note before ordering. Brake pads should be inspected and replaced if wear or glazing is present, and the hub face should be cleaned before mounting.

Quality Assurance

StopTech builds this rotor with corrosion protection and high-carbon metallurgy in most applications to support quieter operation and improved crack resistance. Part number 128.44139R is manufactured as a direct replacement rotor for the specified Lexus fitments.