{"product_id":"g8x-m-series-rear-replacement-rotor","title":"SPECWORKS BMW G8X M SERIES REAR BRAKE DISCS — 2-PIECE FLOATING ROTOR — OEM REPLACEMENT","description":"\u003cp\u003e\u003cstrong\u003eDirect OEM Replacement. Race-Grade Upgrade. Built For The G8X M Series.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUpgrade the rear brakes on your BMW G80 M3, G82 M4, or G87 M2 with the SPECWORKS 2-piece floating rotor — a direct OEM-size replacement engineered to deliver superior pedal feel, better cooling, and longer service life than the factory one-piece disc.\u003c\/p\u003e\n\u003cp\u003eDirect bolt-on fitment — no caliper changes, no bracket changes, no compromises.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e🔥 ROTOR — SPECWORKS 2-PIECE FLOATING DISC\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM-matched rear disc dimensions\u003c\/strong\u003e for direct fitment\u003c\/li\u003e\n\u003cli\u003eTwo-piece floating construction — iron rotor ring + aluminium hat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHERMACORE™\u003c\/strong\u003e proprietary high-carbon iron alloy rotor ring — engineered in-house for superior heat management\u003c\/li\u003e\n\u003cli\u003eOptimised internal vane geometry for faster cooling\u003c\/li\u003e\n\u003cli\u003eFloating bobbin design accommodates thermal expansion under repeated hard stops\u003c\/li\u003e\n\u003cli\u003eHard-anodised aluminium hat — corrosion-resistant and durable\u003c\/li\u003e\n\u003cli\u003eServiceable design — replace the ring only when worn, keep the hat\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e❄️ SUPERIOR COOLING\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe two-piece design physically separates the rotor ring from the hub via the aluminium hat, dramatically reducing heat transfer into the wheel bearing and hub assembly. Combined with the optimised vane geometry and THERMACORE™ alloy, the rotor sheds heat faster and stays within its ideal operating window — even under back-to-back hard stops.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e🦶 PEDAL FEEL YOU CAN TRUST\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe floating bobbin construction allows the rotor ring to expand naturally under thermal load — eliminating the pedal pulsation, judder, and distortion that plague one-piece OEM discs after repeated heat cycles. The result is a \u003cstrong\u003efirm, consistent, and predictable pedal\u003c\/strong\u003e — lap after lap, stop after stop.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e🛡️ DURABILITY THAT LASTS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCast from our proprietary \u003cstrong\u003eTHERMACORE™\u003c\/strong\u003e high-carbon iron alloy, the rotor ring is engineered specifically to resist:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCracking under repeated thermal cycling\u003c\/li\u003e\n\u003cli\u003eWarping and hard-spotting from hard stops\u003c\/li\u003e\n\u003cli\u003eHeat checking on high-temp track use\u003c\/li\u003e\n\u003cli\u003ePremature wear from aggressive pad compounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBuilt to survive the abuse the OEM disc simply wasn't designed for.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e🔧 SERVICEABLE BY DESIGN\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUnlike OEM one-piece discs — where a worn rotor means a full replacement — the SPECWORKS 2-piece design lets you \u003cstrong\u003ereplace only the rotor ring\u003c\/strong\u003e when it reaches wear limits. The aluminium hat and hardware are retained, keeping long-term ownership costs down and reducing waste.\u003c\/p\u003e\n\u003cp\u003eBuy once. Service when needed. Keep going.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e🎨 CUSTOMISATION OPTIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotor face pattern:\u003c\/strong\u003e J HOOK \/ Curved Slot \/ TY Slot\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminium hat colour anodising:\u003c\/strong\u003e BLACK \/ BRONZE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e📦 WHAT'S IN THE KIT\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2 x SPECWORKS 2-piece floating rear rotors (L\/R handed)\u003c\/li\u003e\n\u003cli\u003e2 x Hard-anodised aluminium hats (pre-assembled)\u003c\/li\u003e\n\u003cli\u003eFloating bobbin hardware kit\u003c\/li\u003e\n\u003cli\u003eFitment instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e🔧 FITMENT\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVehicle:\u003c\/strong\u003e BMW M Series (G8X chassis)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Models:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eG80 M3 \/ M3 Competition \/ M3 CS\u003c\/li\u003e\n\u003cli\u003eG82 M4 \/ M4 Competition \/ M4 CS\u003c\/li\u003e\n\u003cli\u003eG87 M2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYears:\u003c\/strong\u003e 2021 – Present\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Rear axle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliper:\u003c\/strong\u003e OEM rear caliper\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e⚠️ \u003cstrong\u003eNote:\u003c\/strong\u003e This kit is designed for models fitted with the \u003cstrong\u003estandard steel rear disc\u003c\/strong\u003e. Not compatible with vehicles equipped with the optional \u003cstrong\u003eCarbon Ceramic Brake (CCB)\u003c\/strong\u003e package.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e📋 SPEC QUICK REFERENCE\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv role=\"region\" class=\"MarkdownTable_tableContainer__2k5Kh\" tabindex=\"0\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003e2-piece floating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Material\u003c\/td\u003e\n\u003ctd\u003eTHERMACORE™ high-carbon iron alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHat Material\u003c\/td\u003e\n\u003ctd\u003eHard-anodised aluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFace Pattern\u003c\/td\u003e\n\u003ctd\u003eJ HOOK \/ Curved Slot \/ TY Slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHat Colour Anodising\u003c\/td\u003e\n\u003ctd\u003eBLACK \/ BRONZE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eDirect OEM replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePosition\u003c\/td\u003e\n\u003ctd\u003eRear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e🛡️ SPECWORKS PROMISE\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEvery SPECWORKS rotor is engineered in-house on our own CNC equipment and cast from our proprietary \u003cstrong\u003eTHERMACORE™\u003c\/strong\u003e alloy — developed exclusively for high-performance braking applications. Race-proven technology, delivered worldwide, backed by our team.\u003c\/p\u003e","brand":"SPECWORKS BRAKES","offers":[{"title":"Bronze \/ Curved","offer_id":52094594711832,"sku":null,"price":8472.0,"currency_code":"HKD","in_stock":true},{"title":"Bronze \/ TY3","offer_id":52746667393304,"sku":null,"price":8472.0,"currency_code":"HKD","in_stock":true},{"title":"Bronze \/ J Hook","offer_id":52746667426072,"sku":null,"price":8472.0,"currency_code":"HKD","in_stock":true},{"title":"Black \/ Curved","offer_id":52094594679064,"sku":null,"price":8472.0,"currency_code":"HKD","in_stock":true},{"title":"Black \/ TY3","offer_id":52746667458840,"sku":null,"price":8472.0,"currency_code":"HKD","in_stock":true},{"title":"Black \/ J Hook","offer_id":52746667491608,"sku":null,"price":8472.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/1326\/7736\/files\/REARROTORFINAL.jpg?v=1779363414","url":"https:\/\/shop.specworksbrakes.com\/products\/g8x-m-series-rear-replacement-rotor","provider":"SPECWORKS BRAKES","version":"1.0","type":"link"}