{"product_id":"girodisc-bmw-g80-g81-m3-g82-g83-m4-g87-m2-2-piece-rear-brake-discs-rotors-pair-a2-282","title":"GiroDisc BMW G80\/G81 M3, G82\/G83 M4 \u0026 G87 M2 2-Piece Rear Brake Discs\/Rotors Pair","description":"\u003cp data-start=\"89\" data-end=\"599\"\u003eEngineered for enthusiasts who demand consistent braking performance under the most demanding conditions, the \u003cstrong data-start=\"199\" data-end=\"236\"\u003eGiroDisc 2-Piece Rear Brake Discs\u003c\/strong\u003e are a premium direct replacement upgrade for the factory rear steel brake discs fitted to the \u003cstrong data-start=\"331\" data-end=\"400\"\u003eBMW G80 M3, G81 M3 Touring, G82 M4, G83 M4 Convertible and G87 M2\u003c\/strong\u003e. Featuring a fully floating two-piece design, these high-performance rear rotors reduce unsprung weight, improve heat management and deliver the durability required for both fast road and track use.\u003c\/p\u003e\n\u003cp data-start=\"601\" data-end=\"1030\"\u003eManufactured in the USA using GiroDisc's proprietary high-carbon iron alloy, these rear brake discs have been developed to provide superior thermal stability and longevity compared to conventional one-piece discs. Combined with GiroDisc's lightweight aluminium hats and motorsport-inspired floating hardware system, they offer an ideal solution for drivers looking to maximise braking consistency and overall vehicle performance.\u003c\/p\u003e\n\u003chr data-start=\"1032\" data-end=\"1035\"\u003e\n\u003ch3 data-section-id=\"1iz91iu\" data-start=\"1037\" data-end=\"1053\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"1055\" data-end=\"1465\"\u003e\n\u003cli data-section-id=\"e3vgne\" data-start=\"1055\" data-end=\"1110\"\u003eDirect replacement for factory rear steel brake discs\u003c\/li\u003e\n\u003cli data-section-id=\"1j9b2yq\" data-start=\"1111\" data-end=\"1161\"\u003eDesigned for BMW G80\/G81 M3, G82\/G83 M4 \u0026amp; G87 M2\u003c\/li\u003e\n\u003cli data-section-id=\"117ol7y\" data-start=\"1162\" data-end=\"1196\"\u003eGiroDisc part number: \u003cstrong data-start=\"1186\" data-end=\"1196\"\u003eA2-282\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1jxdn8x\" data-start=\"1197\" data-end=\"1234\"\u003eFully floating 2-piece rotor design\u003c\/li\u003e\n\u003cli data-section-id=\"ldlkeu\" data-start=\"1235\" data-end=\"1271\"\u003eReduces unsprung and rotating mass\u003c\/li\u003e\n\u003cli data-section-id=\"1y34zqi\" data-start=\"1272\" data-end=\"1314\"\u003eProprietary high-carbon iron rotor rings\u003c\/li\u003e\n\u003cli data-section-id=\"60ewji\" data-start=\"1315\" data-end=\"1340\"\u003eReusable aluminium hats\u003c\/li\u003e\n\u003cli data-section-id=\"1pvxtps\" data-start=\"1341\" data-end=\"1375\"\u003e48 curved internal cooling vanes\u003c\/li\u003e\n\u003cli data-section-id=\"1j0wmej\" data-start=\"1376\" data-end=\"1414\"\u003eRace-proven floating hardware system\u003c\/li\u003e\n\u003cli data-section-id=\"1mf7p3x\" data-start=\"1415\" data-end=\"1448\"\u003eSuitable for road and track use\u003c\/li\u003e\n\u003cli data-section-id=\"1bx1ekl\" data-start=\"1449\" data-end=\"1465\"\u003eSold as a pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1467\" data-end=\"1470\"\u003e\n\u003ch3 data-section-id=\"1ro1pgg\" data-start=\"1472\" data-end=\"1508\"\u003eLightweight 2-Piece Construction\u003c\/h3\u003e\n\u003cp data-start=\"1510\" data-end=\"1597\"\u003eThe GiroDisc rear rotor assembly utilises a lightweight two-piece design consisting of:\u003c\/p\u003e\n\u003cul data-start=\"1599\" data-end=\"1701\"\u003e\n\u003cli data-section-id=\"g2yf1z\" data-start=\"1599\" data-end=\"1629\"\u003eHigh-carbon iron rotor rings\u003c\/li\u003e\n\u003cli data-section-id=\"1is8rt5\" data-start=\"1630\" data-end=\"1667\"\u003eCNC-machined 6061-T6 aluminium hats\u003c\/li\u003e\n\u003cli data-section-id=\"4ne8f4\" data-start=\"1668\" data-end=\"1701\"\u003eHigh-strength floating hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1703\" data-end=\"1743\"\u003eThis advanced construction helps reduce:\u003c\/p\u003e\n\u003cul data-start=\"1745\" data-end=\"1783\"\u003e\n\u003cli data-section-id=\"18y5hdq\" data-start=\"1745\" data-end=\"1762\"\u003eUnsprung weight\u003c\/li\u003e\n\u003cli data-section-id=\"1pltf25\" data-start=\"1763\" data-end=\"1783\"\u003eRotational inertia\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1785\" data-end=\"1886\"\u003eResulting in improved suspension response, sharper vehicle dynamics and enhanced braking performance.\u003c\/p\u003e\n\u003chr data-start=\"1888\" data-end=\"1891\"\u003e\n\u003ch3 data-section-id=\"q56kdr\" data-start=\"1893\" data-end=\"1925\"\u003eAdvanced Cooling Performance\u003c\/h3\u003e\n\u003cp data-start=\"1927\" data-end=\"2035\"\u003eEach rear rotor incorporates \u003cstrong data-start=\"1956\" data-end=\"1984\"\u003e48 curved internal vanes\u003c\/strong\u003e, engineered to function as a centrifugal air pump.\u003c\/p\u003e\n\u003cp data-start=\"2037\" data-end=\"2049\"\u003eThis design:\u003c\/p\u003e\n\u003cul data-start=\"2051\" data-end=\"2204\"\u003e\n\u003cli data-section-id=\"vlas7n\" data-start=\"2051\" data-end=\"2083\"\u003eDraws cool air through the hub\u003c\/li\u003e\n\u003cli data-section-id=\"omi3d4\" data-start=\"2084\" data-end=\"2120\"\u003eIncreases airflow through the disc\u003c\/li\u003e\n\u003cli data-section-id=\"yq45p5\" data-start=\"2121\" data-end=\"2153\"\u003eReduces operating temperatures\u003c\/li\u003e\n\u003cli data-section-id=\"vs3edi\" data-start=\"2154\" data-end=\"2204\"\u003eImproves thermal recovery between braking events\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2206\" data-end=\"2223\"\u003eBenefits include:\u003c\/p\u003e\n\u003cul data-start=\"2225\" data-end=\"2362\"\u003e\n\u003cli data-section-id=\"1h75at3\" data-start=\"2225\" data-end=\"2260\"\u003eImproved resistance to brake fade\u003c\/li\u003e\n\u003cli data-section-id=\"14dfpua\" data-start=\"2261\" data-end=\"2291\"\u003eEnhanced braking consistency\u003c\/li\u003e\n\u003cli data-section-id=\"157k03q\" data-start=\"2292\" data-end=\"2334\"\u003eBetter heat dissipation during track use\u003c\/li\u003e\n\u003cli data-section-id=\"3e019d\" data-start=\"2335\" data-end=\"2362\"\u003eIncreased rotor longevity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2364\" data-end=\"2367\"\u003e\n\u003ch3 data-section-id=\"ml2ig4\" data-start=\"2369\" data-end=\"2413\"\u003eProprietary High-Carbon Iron Rotor Rings\u003c\/h3\u003e\n\u003cp data-start=\"2415\" data-end=\"2557\"\u003eThe rotor rings are machined from GiroDisc's own high-carbon iron casting, developed specifically for performance and motorsport applications.\u003c\/p\u003e\n\u003cp data-start=\"2559\" data-end=\"2578\"\u003eAdvantages include:\u003c\/p\u003e\n\u003cul data-start=\"2580\" data-end=\"2737\"\u003e\n\u003cli data-section-id=\"1lplhmk\" data-start=\"2580\" data-end=\"2611\"\u003eExceptional thermal stability\u003c\/li\u003e\n\u003cli data-section-id=\"12h73jn\" data-start=\"2612\" data-end=\"2640\"\u003eIncreased crack resistance\u003c\/li\u003e\n\u003cli data-section-id=\"1ca8qjq\" data-start=\"2641\" data-end=\"2682\"\u003eImproved durability under heavy braking\u003c\/li\u003e\n\u003cli data-section-id=\"8gshu6\" data-start=\"2683\" data-end=\"2704\"\u003eLonger service life\u003c\/li\u003e\n\u003cli data-section-id=\"i33nii\" data-start=\"2705\" data-end=\"2737\"\u003eConsistent braking performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2739\" data-end=\"2869\"\u003eThis superior metallurgy helps the rotors withstand repeated heat cycles often encountered during track days and spirited driving.\u003c\/p\u003e\n\u003chr data-start=\"2871\" data-end=\"2874\"\u003e\n\u003ch3 data-section-id=\"1v1a4gz\" data-start=\"2876\" data-end=\"2914\"\u003eFully Floating Motorsport Hardware\u003c\/h3\u003e\n\u003cp data-start=\"2916\" data-end=\"2999\"\u003eEach rotor assembly features GiroDisc's race-proven floating system, incorporating:\u003c\/p\u003e\n\u003cul data-start=\"3001\" data-end=\"3094\"\u003e\n\u003cli data-section-id=\"x54gst\" data-start=\"3001\" data-end=\"3033\"\u003eHigh-strength steel drive pins\u003c\/li\u003e\n\u003cli data-section-id=\"1cfrce1\" data-start=\"3034\" data-end=\"3054\"\u003eBelleville washers\u003c\/li\u003e\n\u003cli data-section-id=\"1wfwjcs\" data-start=\"3055\" data-end=\"3069\"\u003eSpring clips\u003c\/li\u003e\n\u003cli data-section-id=\"1e0cep2\" data-start=\"3070\" data-end=\"3094\"\u003eControlled rotor float\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3096\" data-end=\"3229\"\u003eThis design allows the rotor ring to expand and contract naturally under extreme temperatures while maintaining precise braking feel.\u003c\/p\u003e\n\u003cp data-start=\"3231\" data-end=\"3245\"\u003eThe result is:\u003c\/p\u003e\n\u003cul data-start=\"3247\" data-end=\"3373\"\u003e\n\u003cli data-section-id=\"1hq7egn\" data-start=\"3247\" data-end=\"3271\"\u003eReduced thermal stress\u003c\/li\u003e\n\u003cli data-section-id=\"xdw9g7\" data-start=\"3272\" data-end=\"3293\"\u003eImproved durability\u003c\/li\u003e\n\u003cli data-section-id=\"6psngd\" data-start=\"3294\" data-end=\"3321\"\u003eConsistent pedal feedback\u003c\/li\u003e\n\u003cli data-section-id=\"1lsmuth\" data-start=\"3322\" data-end=\"3373\"\u003eStreet-friendly operation without excessive noise\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3375\" data-end=\"3378\"\u003e\n\u003ch3 data-section-id=\"1wrkrjr\" data-start=\"3380\" data-end=\"3408\"\u003eServiceable Rotor Design\u003c\/h3\u003e\n\u003cp data-start=\"3410\" data-end=\"3572\"\u003eUnlike many conventional brake discs, GiroDisc's two-piece design allows the aluminium hats to be reused when the rotor rings reach the end of their service life.\u003c\/p\u003e\n\u003cp data-start=\"3574\" data-end=\"3603\"\u003eReplacement ring part number:\u003c\/p\u003e\n\u003cul data-start=\"3605\" data-end=\"3617\"\u003e\n\u003cli data-section-id=\"1j3684r\" data-start=\"3605\" data-end=\"3617\"\u003e\u003cstrong data-start=\"3607\" data-end=\"3617\"\u003eD2-282\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3619\" data-end=\"3740\"\u003eThis significantly reduces long-term running costs while maintaining the benefits of a premium motorsport braking system.\u003c\/p\u003e\n\u003cp data-start=\"3742\" data-end=\"3793\"\u003eGiroDisc recommends replacing the rotor rings when:\u003c\/p\u003e\n\u003cul data-start=\"3795\" data-end=\"3883\"\u003e\n\u003cli data-section-id=\"h1exep\" data-start=\"3795\" data-end=\"3829\"\u003eRotor thickness reaches \u003cstrong data-start=\"3821\" data-end=\"3829\"\u003e22mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1k3p5wq\" data-start=\"3830\" data-end=\"3883\"\u003eA crack extends to the outer edge of the rotor ring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3885\" data-end=\"3888\"\u003e\n\u003ch3 data-section-id=\"swy07x\" data-start=\"3890\" data-end=\"3915\"\u003ePremium Manufacturing\u003c\/h3\u003e\n\u003cp data-start=\"3917\" data-end=\"4036\"\u003eAll major GiroDisc components are manufactured in-house in Bellingham, Washington using domestically sourced materials.\u003c\/p\u003e\n\u003cp data-start=\"4038\" data-end=\"4060\"\u003eConstruction includes:\u003c\/p\u003e\n\u003cul data-start=\"4062\" data-end=\"4214\"\u003e\n\u003cli data-section-id=\"1y2hymj\" data-start=\"4062\" data-end=\"4086\"\u003e6061-T6 aluminium hats\u003c\/li\u003e\n\u003cli data-section-id=\"14tfi9v\" data-start=\"4087\" data-end=\"4110\"\u003eBlack anodised finish\u003c\/li\u003e\n\u003cli data-section-id=\"x54gst\" data-start=\"4111\" data-end=\"4143\"\u003eHigh-strength steel drive pins\u003c\/li\u003e\n\u003cli data-section-id=\"1imfxb\" data-start=\"4144\" data-end=\"4181\"\u003eCorrosion-resistant cadmium plating\u003c\/li\u003e\n\u003cli data-section-id=\"1ka4dt3\" data-start=\"4182\" data-end=\"4214\"\u003ePrecision-machined rotor rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4216\" data-end=\"4297\"\u003eThis attention to detail ensures exceptional quality, durability and performance.\u003c\/p\u003e\n\u003chr data-start=\"4299\" data-end=\"4302\"\u003e\n\u003ch3 data-section-id=\"1dqbs77\" data-start=\"4304\" data-end=\"4330\"\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul data-start=\"4332\" data-end=\"4620\"\u003e\n\u003cli data-section-id=\"60tb72\" data-start=\"4332\" data-end=\"4362\"\u003eGiroDisc Part Number: A2-282\u003c\/li\u003e\n\u003cli data-section-id=\"1j5j19l\" data-start=\"4363\" data-end=\"4408\"\u003eConfiguration: Fully Floating 2-Piece Rotor\u003c\/li\u003e\n\u003cli data-section-id=\"ix7k0q\" data-start=\"4409\" data-end=\"4455\"\u003eRotor Material: Proprietary High-Carbon Iron\u003c\/li\u003e\n\u003cli data-section-id=\"kllpm1\" data-start=\"4456\" data-end=\"4489\"\u003eHat Material: 6061-T6 Aluminium\u003c\/li\u003e\n\u003cli data-section-id=\"1f30qv8\" data-start=\"4490\" data-end=\"4518\"\u003eHat Finish: Black Anodised\u003c\/li\u003e\n\u003cli data-section-id=\"1ovcdwl\" data-start=\"4519\" data-end=\"4560\"\u003eInternal Cooling Vanes: 48 Curved Vanes\u003c\/li\u003e\n\u003cli data-section-id=\"yac8m6\" data-start=\"4561\" data-end=\"4576\"\u003eSold As: Pair\u003c\/li\u003e\n\u003cli data-section-id=\"bperyr\" data-start=\"4577\" data-end=\"4620\"\u003eMinimum Recommended Rotor Thickness: 22mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4622\" data-end=\"4625\"\u003e\n\u003ch3 data-section-id=\"purqi0\" data-start=\"4627\" data-end=\"4644\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp data-start=\"4646\" data-end=\"4703\"\u003eSuitable for vehicles equipped with factory steel brakes.\u003c\/p\u003e\n\u003ch4 data-start=\"4705\" data-end=\"4720\"\u003eBMW G80 M3\u003c\/h4\u003e\n\u003cul data-start=\"4722\" data-end=\"4791\"\u003e\n\u003cli data-section-id=\"1jxlopt\" data-start=\"4722\" data-end=\"4734\"\u003eBMW G80 M3\u003c\/li\u003e\n\u003cli data-section-id=\"15hc1w4\" data-start=\"4735\" data-end=\"4759\"\u003eBMW G80 M3 Competition\u003c\/li\u003e\n\u003cli data-section-id=\"2jqsu8\" data-start=\"4760\" data-end=\"4791\"\u003eBMW G80 M3 Competition xDrive\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"4793\" data-end=\"4816\"\u003eBMW G81 M3 Touring\u003c\/h4\u003e\n\u003cul data-start=\"4818\" data-end=\"4871\"\u003e\n\u003cli data-section-id=\"hw644c\" data-start=\"4818\" data-end=\"4838\"\u003eBMW G81 M3 Touring\u003c\/li\u003e\n\u003cli data-section-id=\"imp44p\" data-start=\"4839\" data-end=\"4871\"\u003eBMW G81 M3 Competition Touring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"4873\" data-end=\"4888\"\u003eBMW G82 M4\u003c\/h4\u003e\n\u003cul data-start=\"4890\" data-end=\"4959\"\u003e\n\u003cli data-section-id=\"1jxk59g\" data-start=\"4890\" data-end=\"4902\"\u003eBMW G82 M4\u003c\/li\u003e\n\u003cli data-section-id=\"10c9yoh\" data-start=\"4903\" data-end=\"4927\"\u003eBMW G82 M4 Competition\u003c\/li\u003e\n\u003cli data-section-id=\"1c66pnp\" data-start=\"4928\" data-end=\"4959\"\u003eBMW G82 M4 Competition xDrive\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"4961\" data-end=\"4988\"\u003eBMW G83 M4 Convertible\u003c\/h4\u003e\n\u003cul data-start=\"4990\" data-end=\"5027\"\u003e\n\u003cli data-section-id=\"1jxhvr9\" data-start=\"4990\" data-end=\"5002\"\u003eBMW G83 M4\u003c\/li\u003e\n\u003cli data-section-id=\"1d2gfao\" data-start=\"5003\" data-end=\"5027\"\u003eBMW G83 M4 Competition\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"5029\" data-end=\"5044\"\u003eBMW G87 M2\u003c\/h4\u003e\n\u003cul data-start=\"5046\" data-end=\"5058\"\u003e\n\u003cli data-section-id=\"1jxet1j\" data-start=\"5046\" data-end=\"5058\"\u003eBMW G87 M2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"5060\" data-end=\"5129\"\u003e\u003cstrong data-start=\"5060\" data-end=\"5129\"\u003eNot compatible with Carbon Ceramic Brake (CCB) equipped vehicles.\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"5131\" data-end=\"5134\"\u003e\n\u003ch3 data-section-id=\"jpe06k\" data-start=\"5136\" data-end=\"5160\"\u003eWhy Choose GiroDisc?\u003c\/h3\u003e\n\u003cp data-start=\"5162\" data-end=\"5243\"\u003eGiroDisc is trusted by professional race teams and BMW enthusiasts worldwide for:\u003c\/p\u003e\n\u003cul data-start=\"5245\" data-end=\"5425\"\u003e\n\u003cli data-section-id=\"180mju5\" data-start=\"5245\" data-end=\"5276\"\u003eMotorsport-proven engineering\u003c\/li\u003e\n\u003cli data-section-id=\"116jwgt\" data-start=\"5277\" data-end=\"5310\"\u003eOutstanding cooling performance\u003c\/li\u003e\n\u003cli data-section-id=\"4hynmi\" data-start=\"5311\" data-end=\"5336\"\u003eReduced unsprung weight\u003c\/li\u003e\n\u003cli data-section-id=\"1gdl28p\" data-start=\"5337\" data-end=\"5373\"\u003eServiceable two-piece construction\u003c\/li\u003e\n\u003cli data-section-id=\"nekel8\" data-start=\"5374\" data-end=\"5425\"\u003eExceptional durability under demanding conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"5427\" data-end=\"5430\"\u003e\n\u003ch3 data-section-id=\"th883x\" data-start=\"5432\" data-end=\"5465\"\u003eWhy Buy from R44 Performance?\u003c\/h3\u003e\n\u003cp data-start=\"5467\" data-end=\"5554\"\u003eR44 Performance supplies premium BMW braking upgrades trusted by enthusiasts worldwide.\u003c\/p\u003e\n\u003cul data-start=\"5556\" data-end=\"5659\"\u003e\n\u003cli data-section-id=\"59t64\" data-start=\"5556\" data-end=\"5573\"\u003eBMW specialists\u003c\/li\u003e\n\u003cli data-section-id=\"prmo11\" data-start=\"5574\" data-end=\"5601\"\u003eGenuine GiroDisc products\u003c\/li\u003e\n\u003cli data-section-id=\"fvo6kf\" data-start=\"5602\" data-end=\"5632\"\u003eFast UK \u0026amp; worldwide shipping\u003c\/li\u003e\n\u003cli data-section-id=\"1jd1uka\" data-start=\"5633\" data-end=\"5659\"\u003eExpert technical support\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"5661\" data-end=\"5871\"\u003eUpgrade your braking system with the \u003cstrong data-start=\"5698\" data-end=\"5769\"\u003eGiroDisc 2-Piece Rear Brake Discs for the BMW G8X M3, M4 and G87 M2\u003c\/strong\u003e, delivering exceptional cooling, reduced weight and race-inspired performance for road and track use.\u003c\/p\u003e","brand":"GiroDisc","offers":[{"title":"Default Title","offer_id":57539629711742,"sku":"A2-282","price":1450.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0280\/7568\/8011\/files\/girodisc-bmw-g80-g81-m3-g82-g83-m4-g87-m2-2-piece-rear-brake-discs-rotors-pair-a2-282.jpg?v=1781257120","url":"https:\/\/r44performance.com\/products\/girodisc-bmw-g80-g81-m3-g82-g83-m4-g87-m2-2-piece-rear-brake-discs-rotors-pair-a2-282","provider":"R44 Performance","version":"1.0","type":"link"}