Gates K120905HD FleetRunner Heavy-Duty Serpentine Belt - 12-Rib 91-1/16 Inch

The Gates K120905HD FleetRunner Heavy-Duty Micro-V Serpentine Belt is engineered specifically for heavy-duty diesel applications, delivering superior performance and extended service life in demanding commercial vehicle environments. This 12-rib belt measures 91-1/16 inches in effective length and features Gates' patented EPDM construction with a distinctive green overcord for enhanced durability.

Key Features:

• Patented EPDM rubber compound provides peak performance at prolonged extreme operating temperatures
• Heavy-duty construction resists cracking and wear, even in extreme temperature conditions
• 12-rib design with 42mm width (2300mm length) for maximum power transmission
• Unique undercord notch pattern offers increased flexibility for smaller diameter pulleys
• Reinforced polyester tensile member for superior stability and load-carrying capacity
• Compatible with automatic tensioners and backside idler configurations
• Unique form grinding ensures precise dimensional control for optimal fit

Designed as a direct OE-quality replacement for Cummins ISX engines, this belt cross-references to Cummins part number 3100189 and fits 2004-2007 Mack CL Series trucks. The FleetRunner series consistently outperforms standard heavy-duty serpentine belts, helping reduce fleet downtime and maintenance costs. Gates recommends replacing the tensioner (if equipped) during belt installation for optimal performance and longevity.