{"product_id":"girodisc-2-piece-rear-rotors-bmw-g87-m2-g80-m3-g82-m4-oe-iron-rotors","title":"Girodisc 2 Piece Rear Rotors BMW G87 M2 \/ G80 M3 \/ G82 M4 (OE Iron Rotors)","description":"\u003cp\u003e\u003cspan\u003eUpgrade the rear braking system of your BMW G8X M2, M3, or M4 with the GiroDisc 370mm Two-Piece Rear Rotor Kit. Designed as a direct replacement for vehicles equipped with factory iron brakes, these fully floating rotors retain the factory brake system architecture while improving thermal management and reducing unnecessary unsprung and rotating mass.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach GiroDisc rotor combines a proprietary high-carbon iron friction ring with a lightweight \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e6061-T6 aluminum center hat\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. The two-piece construction allows the friction ring to be replaced independently when worn, allowing the center hat to be reused and reducing long-term servicing costs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eGiroDisc utilizes \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e48 curved internal cooling vanes\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e that act as a centrifugal pump, pulling air through the center of the rotor and efficiently evacuating heat during repeated hard braking. This increased thermal management makes the rotors particularly well suited for aggressive street driving and track use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe fully floating design allows the iron friction ring to expand independently as temperatures increase while maintaining proper alignment with the brake pads. High-strength alloy-steel drive pins, spring clips, and Belleville washers provide race-ready rotor float while remaining quiet enough for regular street use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePair these rear rotors with the GiroDisc A1-282 380mm Front Rotor Kit for a complete two-piece GiroDisc brake rotor upgrade on your G8X M2, M3, or M4.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFitment Notes\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFits \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBMW G87 M2\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFits \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBMW G80 M3\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFits \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBMW G82 M4 Coupe\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFits \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBMW G83 M4 Convertible\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDesigned for vehicles equipped with \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003efactory iron brakes\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDoes not fit factory carbon ceramic brake applications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDirect replacement for the factory rear rotors\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRetains the factory rear brake system\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eNo permanent vehicle modifications required\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReplacement friction rings are available separately as \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGiroDisc D2-282\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003ePairs with \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGiroDisc A1-282 380mm Front Rotors\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eIncluded\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 GiroDisc left rear two-piece rotor assembly\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 GiroDisc right rear two-piece rotor assembly\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReusable 6061-T6 aluminum rotor hats\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGiroDisc high-carbon iron friction rings\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFully floating drive hardware\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eProduct Specs\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGiroDisc Part Number: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eA2-282\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eProduct Type: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eTwo-Piece Fully Floating Rear Rotors\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRotor Diameter: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e370mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMinimum Replacement Thickness: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e22mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCooling Vanes: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e48 Curved Vanes\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFriction Ring Material: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGiroDisc Proprietary High-Carbon Cast Iron\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCenter Hat Material: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e6061-T6 Aluminum\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCenter Hat Finish: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBlack Anodized\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDrive Pin Material: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHigh-Strength Steel Alloy\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDrive Pin Finish: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eCadmium Plated\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRotor Design: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFully Floating\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFloating Hardware: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSpring Clips and Belleville Washers\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReplacement Ring Part Number: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eD2-282\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eManufacturing Location: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBellingham, Washington, USA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eQuantity: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSold as a Pair\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eProduct Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e48 curved internal cooling vanes\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e act as a centrifugal pump to move air through the rotor and improve heat evacuation during demanding braking\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFully floating \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003etwo-piece construction\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e allows the friction ring to expand under high temperatures while maintaining proper brake-pad alignment\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eLightweight \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e6061-T6 aluminum center hats\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e help reduce unsprung and rotating mass compared with conventional one-piece rotor construction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eProprietary \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ehigh-carbon iron friction rings\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e are engineered to withstand repeated high-temperature braking and demanding performance use\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eReusable center hats and replaceable D2-282 friction rings\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e allow worn rings to be serviced without replacing the complete rotor assembly\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eManufactured in-house by GiroDisc in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBellingham, Washington\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e using domestically sourced materials for all major components\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GiroDisc","offers":[{"title":"Default Title","offer_id":67726951678272,"sku":"GIRA2-282","price":1350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0704\/7587\/4624\/files\/408mm72v__28533_8a0b160f-042f-40e8-b6c0-46842a6d7101.jpg?v=1791383106","url":"https:\/\/www.forzamotorworks.com\/products\/girodisc-2-piece-rear-rotors-bmw-g87-m2-g80-m3-g82-m4-oe-iron-rotors","provider":"Forza Motor Works","version":"1.0","type":"link"}