Stoptech 127.51020L Disc Brake Rotor - Front Left

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.51020L) are engineered for enhanced braking performance on select Hyundai and Kia vehicles. Designed with a vented, slotted, and cross-drilled surface, these rotors provide improved heat dissipation and consistent stopping power for models like the Hyundai Sonata and Kia Optima.

• Cross-drilled and slotted rotor surface for better heat and gas dissipation
• Vented rotor design to reduce brake fade during extended use
• Coated hat finish to resist corrosion and extend rotor life
• Compatible with Hyundai Forte, Sonata, Tucson, and Kia Sportage, Optima, Veloster, among others
• Floating disc mounting for improved rotor alignment and performance
• Disc dimensions: 300 mm outside diameter, 28 mm nominal thickness
• 5 lug holes with 114.3 mm bolt circle diameter

About the StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Line

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line focuses on delivering rotors that combine advanced surface treatments with vented rotor technology. This product line is designed to improve braking efficiency by enhancing heat dissipation and reducing brake fade, making it suitable for both daily driving and spirited performance applications. The 127.51020L rotor features a coated hat finish to protect against rust and a floating disc mounting system to maintain optimal rotor alignment under stress.

Technical Specifications and Features

This disc brake rotor has a nominal thickness of 28.0 mm and a discard thickness of 26.4 mm, ensuring a long service life before replacement is necessary. The rotor’s overall height measures 47.7 mm, with a center hole diameter of 69 mm and a mounting bolt hole circle diameter of 114.3 mm. The rotor is vented with straight vanes to promote airflow and cooling. It weighs approximately 19.25 lbs (8.75 kg), balancing durability and performance. Note that this rotor does not include ABS tone rings or bearings.

Compatible Vehicles and Applications

• Hyundai Forte, Forte5, Forte Koup
• Hyundai ix35, Sonata, Tucson, Veloster
• Kia Optima, Rondo, Sportage, Tucson

This rotor is designed to replace factory disc brake rotors on these models, providing improved braking response and heat management.

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat buildup during aggressive driving
• Uneven rotor wear leading to brake pulsation or noise
• Corrosion and rust on rotor surfaces reducing braking efficiency
• Reduced stopping power from glazed or worn factory rotors
• Brake dust accumulation affecting pad and rotor performance

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 26.4 mm before installation. Clean the rotor surface to remove any protective coatings or oils. Use proper torque specifications for the 5 lug bolts on the 114.3 mm bolt circle. Verify compatibility with your vehicle’s brake system, especially if ABS tone rings or bearings are required separately. The floating disc mounting design requires careful alignment during installation to maintain optimal rotor performance.

Quality Assurance and Warranty

StopTech 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 the product documentation or manufacturer for exact warranty terms.