{"product_id":"dynamite-friction-644-31108-disc-brake-rotor","title":"Dynamite Friction 644-31108 Disc Brake Rotor - Front","description":"\u003ch2\u003eOverview of Dynamite Friction DFC GEOSPEC Coated Rotor\u003c\/h2\u003e\u003cp\u003eThe Dynamite Friction DFC GEOSPEC Coated Rotor - Dimpled and Slotted (part number 644-31108) is engineered for precision braking performance on select BMW models. Designed with vented construction and advanced coating, this rotor supports consistent heat dissipation and corrosion resistance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eVented disc brake rotor with dimpled and slotted surface\u003c\/li\u003e\n\u003cli\u003eNominal thickness of 30 mm and discard thickness of 28.4 mm\u003c\/li\u003e\n\u003cli\u003e340 mm outside diameter and 79 mm inside diameter\u003c\/li\u003e\n\u003cli\u003eFive bolt holes with 16.6 mm diameter each\u003c\/li\u003e\n\u003cli\u003eHeight of 73.6 mm for proper fitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Features and Specifications\u003c\/h2\u003e\u003cp\u003eThis disc brake rotor is vented to improve airflow and reduce heat buildup during braking, which helps maintain braking efficiency and rotor longevity. The dimpled and slotted design enhances pad bite and assists in debris and gas removal, contributing to consistent stopping power. The rotor’s nominal thickness is 30 mm, with a discard thickness of 28.4 mm, ensuring safe replacement intervals. With an outside diameter of 340 mm and an inside diameter of 79 mm, it is designed to fit specific BMW models requiring these dimensions. The rotor includes five bolt holes, each 16.6 mm in diameter, to match factory mounting specifications. The height of 73.6 mm ensures compatibility with the brake caliper assembly.\u003c\/p\u003e\u003ch2\u003eDFC GEOSPEC Coated Rotor - Dimpled and Slotted Product Line\u003c\/h2\u003e\u003cp\u003eThe DFC GEOSPEC Coated Rotor - Dimpled and Slotted line from Dynamite Friction focuses on rotors that combine protective coatings with performance-enhancing surface features. The coating helps resist corrosion and extends rotor life, while the dimpled and slotted pattern improves braking response and heat dissipation. This product line is suitable for drivers seeking rotors that maintain consistent performance under varied driving conditions.\u003c\/p\u003e\u003ch2\u003eCompatible BMW Models and Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCompatible with BMW 1 Series models including 118i, 120i, M135i, and M140i\u003c\/li\u003e\n\u003cli\u003eFits BMW 2 Series models such as 230i, 230i xDrive, M235i, M235i xDrive, M240i, and M240i xDrive\u003c\/li\u003e\n\u003cli\u003eSuitable for BMW 3 Series including 328i, 330i, 330i xDrive, 335i, 335i xDrive, 335i GT xDrive, 340i, 340i xDrive, and 340i GT xDrive\u003c\/li\u003e\n\u003cli\u003eCompatible with BMW 4 Series models like 428i, 428i xDrive, 428i Gran Coupe, 428i xDrive Gran Coupe, 430i, 430i xDrive, 430i Gran Coupe, 430i xDrive Gran Coupe, 435i, 435i xDrive, 435i Gran Coupe, 435i xDrive Gran Coupe, 440i, 440i xDrive, 440i Gran Coupe, and 440i xDrive Gran Coupe\u003c\/li\u003e\n\u003cli\u003eAlso fits BMW ActiveHybrid 3\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Issues Addressed by This Rotor\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrake fade caused by excessive heat buildup\u003c\/li\u003e\n\u003cli\u003eUneven brake pad wear due to rotor surface imperfections\u003c\/li\u003e\n\u003cli\u003eCorrosion and rust on rotor surfaces affecting braking performance\u003c\/li\u003e\n\u003cli\u003eVibration or pulsation during braking from warped rotors\u003c\/li\u003e\n\u003cli\u003eReduced braking efficiency from glazed or contaminated rotors\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure rotor discard thickness of 28.4 mm is not exceeded before replacement\u003c\/li\u003e\n\u003cli\u003eVerify bolt hole alignment and diameter (16.6 mm) for proper mounting\u003c\/li\u003e\n\u003cli\u003eClean rotor surface before installation to remove any protective coatings or residues\u003c\/li\u003e\n\u003cli\u003eUse proper torque specifications for the five mounting bolts to avoid rotor warping\u003c\/li\u003e\n\u003cli\u003eInspect brake pads and calipers during installation for optimal system performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDynamite Friction rotors, including the DFC GEOSPEC Coated Rotor - Dimpled and Slotted (part number 644-31108), are manufactured to meet OEM standards for fit and function. The vented design and coating contribute to durability and corrosion resistance. Please refer to Dynamite Friction’s warranty policy for specific coverage details.\u003c\/p\u003e","brand":"Dynamite Friction","offers":[{"title":"Default Title","offer_id":43389652271285,"sku":"HBHR-644-31108","price":107.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DF_64431108_Fro_ebfc5b9c-31be-4d5a-8084-8714db3e973d.jpg?v=1774634592","url":"https:\/\/www.partcatalog.com\/products\/dynamite-friction-644-31108-disc-brake-rotor","provider":"PartCatalog","version":"1.0","type":"link"}