{"product_id":"powerstop-ar85121-disc-brake-rotor-rear","title":"PowerStop AR85121 Disc Brake Rotor - Rear","description":"\u003ch2\u003eRear OE Replacement Rotor\u003c\/h2\u003e\u003cp\u003ePower Stop Autospecialty brake rotors are built as a direct-fit replacement for original equipment fit and performance. This rear disc brake rotor is engineered for heavy-duty applications and matches the dimensions needed for proper brake service on Ram 4500 and Ram 5500 trucks.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirect-fit rear brake rotor for OE-style replacement service.\u003c\/li\u003e\n\u003cli\u003eVented rotor design for improved heat management.\u003c\/li\u003e\n\u003cli\u003e15.40 in. outside diameter with 10 lug holes.\u003c\/li\u003e\n\u003cli\u003eMatches the specified thickness and bolt circle dimensions for correct fitment.\u003c\/li\u003e\n\u003cli\u003ePower Stop Autospecialty line for stock replacement brake service.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003ePower Stop AR85121 is a rear disc brake rotor designed for Ram 4500 and Ram 5500 applications, including 2008-2010 Dodge Ram 4500 and Ram 5500 and 2011-2026 Ram 4500 and Ram 5500. The vented construction, 390.10 mm outside diameter, and 163.00 mm bolt circle diameter support proper rotor fit and brake system alignment. As part of the Power Stop Autospecialty line, AR85121 focuses on OE stock replacement requirements for rear brake service.\u003c\/p\u003e\u003cp\u003eThis part cross-references Monroe Shocks \u0026amp; Struts (e.g., 172286, 182286) for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing a worn rear brake rotor with an OE-style direct-fit part.\u003c\/li\u003e\n\u003cli\u003eAddressing brake pulsation caused by rotor wear or thickness variation.\u003c\/li\u003e\n\u003cli\u003eRestoring proper braking surface contact during brake service.\u003c\/li\u003e\n\u003cli\u003eCorrecting rotor-related noise or vibration from an out-of-spec disc.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify rear axle fitment, bolt circle diameter, and rotor dimensions before installation. Compare the old rotor to the new unit for outside diameter, overall height, and lug-hole count to confirm application match. Follow standard brake service procedures and inspect related brake components during replacement.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003ePower Stop positions this rotor as an OE-fit replacement within its Autospecialty brake line, with dimensions and construction intended to match original equipment requirements.\u003c\/p\u003e","brand":"PowerStop","offers":[{"title":"Default Title","offer_id":53621518598325,"sku":"BHKQ-AR85121","price":166.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/P8_AR85121_Fro.jpg?v=1793163977","url":"https:\/\/www.partcatalog.com\/products\/powerstop-ar85121-disc-brake-rotor-rear","provider":"PartCatalog","version":"1.0","type":"link"}