Stoptech 126.34048SR Disc Brake Rotor - Front Right

StopTech Sport Slotted Disc Brake Rotors Overview

The StopTech Sport Slotted Disc Brake Rotors (Part Number 126.34048SR) are engineered for BMW models including the 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4. Designed to enhance braking performance, these rotors feature a vented and slotted surface to improve heat dissipation and maintain consistent stopping power under demanding conditions.

• Compatible with BMW 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4
• Part Number: 126.34048SR
• Vented disc design with straight vane style for efficient cooling
• Slotted surface type to reduce brake fade and improve pad bite
• Coated hat finish for corrosion resistance
• Floating disc mounting for better rotor alignment and performance
• Outside diameter: 300 mm (11.811 inches)
• Nominal thickness: 22.000 mm (0.866 inches)
• Discard thickness: 20.400 mm (0.803 inches)
• Overall height: 51.500 mm (2.028 inches)
• 5 lug holes with 120 mm bolt circle diameter

Detailed Product Description

The StopTech Sport Slotted Disc Brake Rotors are precision-engineered replacement rotors designed specifically for select BMW vehicles. Featuring a vented rotor design with straight vanes, these rotors promote optimal airflow to reduce heat buildup during braking. The slotted surface helps to evacuate gases, dust, and debris from the brake pad surface, improving pad contact and reducing brake fade. The coated hat finish provides corrosion resistance, extending the rotor's service life. The floating disc mounting system allows for slight rotor movement, which helps maintain even pad wear and consistent braking performance.

Applications and Problem Solving

• Improves braking performance on BMW 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4 models
• Reduces brake fade during aggressive driving or track use
• Minimizes rotor warping caused by excessive heat
• Enhances pad bite and reduces brake dust buildup
• Prevents corrosion on the rotor hat area for longer durability

Installation Notes and Tips

• Ensure compatibility with your specific BMW model and year before installation
• Check rotor thickness and discard limits (nominal thickness 22.000 mm, discard thickness 20.400 mm) to confirm rotor condition
• Use proper torque specifications for the 5 lug holes with 120 mm bolt circle diameter
• Inspect brake pads and replace if worn to maximize rotor performance
• Follow manufacturer guidelines for bedding-in new rotors and pads

Quality Assurance and Warranty

StopTech Sport Slotted Disc Brake Rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The coated hat finish and vented design contribute to long-lasting durability and consistent braking performance. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Refer to StopTech or authorized distributors for exact warranty terms.

About StopTech Sport Slotted Disc Brake Rotors

The StopTech Sport Slotted Disc Brake Rotors line is designed for drivers seeking improved braking performance with enhanced cooling and pad bite characteristics. The slotted design helps maintain clean pad surfaces and reduces brake fade, making these rotors suitable for spirited street driving and occasional track use. This product line balances durability with performance, providing a reliable upgrade for BMW vehicles such as the 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4.