R1 Concepts 2551-1839-00 Disc Brake Pad Set - Rear

Rear Brake Pads for Cadillac ATS and CTS

R1 Concepts R1 Optimum OE Pads, part number 2551-1839-00, are rear disc brake pads for select Cadillac ATS and CTS applications. This pad set is built for drivers replacing worn rear brake linings on 2013-2019 Cadillac ATS and 2014-2019 Cadillac CTS models with the listed brake configurations.

Key Features

• Disc brake pad set for the rear axle
• R1 Optimum OE Pads product line
• Direct fitment for select Cadillac ATS and CTS rear brake applications
• Part number 2551-1839-00 for ordering and catalog matching
• Application-specific coverage for standard brake linings, standard disc, slotted disc, and listed caliper configurations

Fitment Details

• Fits 2017-2019 Cadillac ATS, rear, 4 piston front calipers; R1 Optimum OE Pads
• Fits 2017-2019 Cadillac CTS, rear, standard brake linings; R1 Optimum OE Pads
• Fits 2014 Cadillac CTS, rear, standard brake linings; R1 Optimum OE Pads
• Fits 2016 Cadillac ATS, rear, standard disc; R1 Optimum OE Pads
• Fits 2015-2016 Cadillac CTS, rear, slotted disc; R1 Optimum OE Pads
• Fits 2013-2015 Cadillac ATS, rear, single piston front calipers; R1 Optimum OE Pads

What This Part Helps Address

• Rear brake pad wear
• Squealing or noisy rear brakes
• Reduced braking response from worn friction material
• Uneven rear brake performance
• Brake service needs on Cadillac ATS and CTS rear brake systems

Installation Notes

Verify the rear brake configuration before ordering, including the caliper and rotor notes listed for each vehicle application. This part number, 2551-1839-00, is specific to the rear position and should be matched to the exact Cadillac ATS or CTS brake setup shown above.

Quality Assurance

R1 Concepts identifies this as part of the R1 Optimum OE Pads line, a cataloged OE-style brake pad offering for the listed Cadillac applications. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.