PowerStop AR8770SCR Disc Brake Rotor - Rear

Coated rear brake rotor replacement

PowerStop AR8770SCR is a rear disc brake rotor built as a direct bolt-on replacement for original equipment. It uses a silver epoxy coating on corrosion-prone areas to help preserve appearance behind alloy wheels while matching OE performance and specifications.

Key features

• Partially coated design protects the hat, outer edge, and vanes from corrosion.
• Full cast construction with mill balancing for consistent operation.
• Solid rotor design with a smooth surface finish.
• Matches original equipment weight and vane count for proper fitment.
• Compatible with 6-lug rear brake applications using a 5.50-inch bolt circle.

Detailed fitment and design

This PowerStop rear brake rotor is engineered for direct replacement service on the Hummer H3 and Hummer H3T. Fits 2006-2010 Hummer H3, rear, and fits 2009-2010 Hummer H3T, rear. The AR8770SCR features a 12.28-inch outside diameter, 0.47-inch nominal thickness, and 0.41-inch discard thickness, with a 2.68-inch overall height. Its solid, smooth-surface design supports OE-style braking performance while the coated finish helps resist rust in exposed areas.

PowerStop’s coated hat and edge rotor line focuses on practical corrosion protection and OE-style replacement fitment. The AR8770SCR follows the original equipment dimensions and construction targets needed for a straightforward brake service on the Hummer H3 and Hummer H3T.

Common reasons to replace

• Brake rotor rust on the hat, edge, or vanes.
• Brake pulsation from rotor wear or thickness loss.
• Uneven braking feel caused by surface deterioration.
• Visible corrosion behind alloy wheels.
• Rotor replacement during rear brake service.

Installation notes and quality

Verify rotor diameter, bolt circle, and thickness before installation. Clean the hub mounting surface and inspect related brake components for wear before reassembly. This part cross-references Monroe Shocks & Struts (e.g., 15111376) for the same application.

PowerStop designs this rotor to match original equipment performance and specifications, including weight and vane count, for confirmed fitment on the listed Hummer applications.