The Gates K100572HD FleetRunner Micro-V Serpentine Drive Belt is a heavy-duty 10-rib belt built for demanding drive systems where durability, flexibility, and consistent power transmission matter, making it a strong option for properly configured Gen 3 HEMI performance applications. Gates manufactures its FleetRunner line using a specialized EPDM construction with the recognizable green overcord, giving the belt resistance to cracking, wear, oil, heat, and the elevated operating temperatures found in demanding belt-drive systems. The FleetRunner design also uses an undercord notch pattern engineered to increase flexibility around smaller-diameter pulleys, an especially useful characteristic when a modified supercharger combination uses a smaller upper pulley to increase blower speed. Its heavy-duty construction is designed to provide increased stability and load-carrying capability, helping maintain dependable belt operation in applications that place greater demands on the drive system. For Gen 3 HEMI owners building a pulley combination that specifically calls for the K100572HD belt size, this Gates belt provides a durable solution from a manufacturer with extensive experience in automotive and heavy-duty belt-drive systems.

Modified supercharged HEMI combinations can be especially demanding on belts because changing pulley diameter changes the operating conditions of the complete supercharger drive system, and smaller upper pulleys can require the belt to flex more tightly while maintaining sufficient contact with the pulley. Gates specifically designs FleetRunner belts with flexibility, stability, load capacity, and resistance to prolonged extreme temperatures in mind. That makes the FleetRunner series a useful choice when selecting a belt for a performance-oriented drive configuration, provided the K100572HD dimensions are correct for the specific pulley arrangement.

The K100572HD is a 10-rib Micro-V belt, with the “K10” designation identifying the 10-rib configuration used in the belt drive. Correct belt sizing is critical on any modified Gen 3 HEMI because upper pulley diameter, lower pulley diameter, idler arrangement, tensioner position, and other drive-system modifications can change the required belt length. A belt that works perfectly on one Hellcat-based combination may be completely wrong after changing one pulley, which is automotive engineering’s way of making sure a five-minute parts order occasionally requires thirty minutes of measuring.

FleetRunner construction also makes the belt suitable for vehicles that see more than an occasional easy cruise. Gates uses an advanced EPDM rubber technology designed to resist deterioration from temperature extremes and other harsh operating conditions while maintaining flexibility and service life. Whether the vehicle is street driven, drag raced, or built around a higher-output supercharger setup, belt condition and correct tension remain important pieces of reliable power delivery.

For Gen 3 HEMI applications using the K100572HD size, this belt can complement upper supercharger pulleys, lower pulley upgrades, adjustable idlers, heavy-duty tensioners, and other belt-drive modifications. Exact vehicle compatibility should be determined by the complete pulley configuration rather than vehicle model alone, especially on modified supercharged applications.

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Specifications & Features

• Brand: Gates
• Product Line: FleetRunner Micro-V
• Manufacturer Part Number: K100572HD
• Product Type: Heavy-Duty Micro-V / Serpentine Drive Belt
• Belt Configuration: 10-rib
• Section: K
• Material: EPDM-based FleetRunner construction
• Color: Distinctive FleetRunner green overcord
• Size / Length: K100572HD application-specific belt length, verify required length against your exact pulley combination
• Weight: Not confirmed in available manufacturer data for K100572HD
• Vehicle Compatibility: Application dependent, suitable only for vehicles and modified drive systems requiring the K100572HD belt dimensions
• Year Compatibility: Not vehicle-year specific, verify by belt-drive configuration
• Engine Compatibility: Applicable Gen 3 HEMI performance combinations requiring a 10-rib K100572HD belt
• Designed for demanding and heavy-duty drive systems
• EPDM construction provides resistance to cracking and wear
• Oil and heat resistant
• Designed for prolonged extreme operating temperatures
• Engineered for flexibility, stability, and load-carrying capacity
• Undercord notch design promotes flexibility around smaller-diameter pulleys
• Suitable for compatible modified supercharger drive systems
• Can be used with compatible upper pulley, lower pulley, idler, and tensioner combinations
• Intended Uses: Supercharger pulley combinations, performance belt-drive systems, street performance, drag racing, and other compatible Gen 3 HEMI applications
• Installation Difficulty: Moderate
• Fitment Note: Belt length must be matched to the exact upper pulley, lower pulley, idler, and tensioner configuration before ordering.