Gates K120878HD FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt 12-Rib 88-5/16 In

The Gates K120878HD FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt is engineered specifically for fleet, commercial, and heavy-duty applications where standard belts fall short. Featuring Gates' patented EPDM construction with a distinctive green overcord, this 12-rib serpentine belt delivers superior durability, stability, and an extended service life even under the most demanding operating conditions.

Key Features:

• Patented EPDM Construction — Advanced rubber compound resists cracking, wear, and deterioration from oil and coolant exposure, even at extreme temperatures
• High-Modulus Aramid Tensile Cord — Low-stretch aramid cord provides exceptional load-carrying capacity and dimensional stability
• Nylon-Fibre Reinforced Undercord — Adds structural integrity and improves flex fatigue resistance over thousands of drive cycles
• Dual Adhesion Gum Layers — Two layers of adhesion gum bond construction elements for maximum strength and long-term durability
• Precision-Ground Belt Profile — Exact-fit design meets strict OEM dimensional specifications for quiet, vibration-free operation
• Distinctive Green Overcord — Visual identifier of the FleetRunner heavy-duty line, separating it from standard Micro-V belts

Specifications:

• Rib Count: 12
• Belt Length: 88-5/16 inches (outside circumference)
• Belt Series: K12 (12-rib Micro-V)
• Material: EPDM rubber
• Construction: FleetRunner Heavy-Duty

Cross-Reference Part Numbers: 12K878, 25-120878, 25-120878HD, 4120878, K120878

The Gates K120878HD is built to reduce fleet downtime and lower total operating costs by outlasting conventional serpentine belts in high-mileage, high-idle, and high-temperature environments. Replacement of the belt tensioner is recommended when installing this belt.