J.C. Whitney SET-JC27110099-2 Rear Brake Disc Rotor 2-Wheel Set OEM Replacement 15712801

The J.C. Whitney SET-JC27110099-2 is a rear disc brake rotor set — a 2-piece, driver and passenger side replacement — designed as a direct OEM-equivalent substitute for GM part number 15712801. This set restores factory braking performance on applicable Sierra/Silverado 2500 and Express/Savana 3500 platforms with a bolt-on fitment that requires no modification.

Key Features:

• OEM Replacement: Direct replacement for GM OEM part number 15712801; also cross-references to part numbers 56830, 55057, 12066043, 125656, and BR55057
• Vented Disc Design: Rear vented brake rotors for improved heat dissipation under load
• Rotor Diameter: 12.99 inches (330 mm) outside diameter
• Overall Height: 3.42 inches (87 mm)
• Center Hole Diameter: 4.63 inches (118 mm)
• Bolt Pattern: 8-lug with 6.5-inch bolt circle diameter
• Material: Steel construction for durability and long service life
• Plain Surface: Standard non-drilled, non-slotted rotor surface for quiet, reliable braking
• Complete Set: Includes 2 rear brake rotors (left and right sides)

This rear brake disc set is built to meet OEM specifications for proper fit, finish, and stopping performance. The application-specific design ensures a precise swap-out of worn or damaged rotors, making it suitable for both DIY installers and professional mechanics.