Gates K081244HD Serpentine Belt

Gates FleetRunner Heavy Duty Micro-V Belt

The Gates FleetRunner Heavy Duty Micro-V Belt is built for heavy-duty accessory drive systems that need stable operation and long service life. This K081244HD serpentine belt uses EPDM construction with a polyester cord and a distinct green overcord to support durability, flexibility, and consistent performance in demanding fleet use.

Compatible with Ram 2500 and Ram 3500 applications equipped with a single alternator, this belt is a direct-fit option for 2019-2025 model years. If you are replacing a worn serpentine belt on a Ram 2500 or Ram 3500, K081244HD provides the correct heavy-duty Micro-V profile for the application.

Key Features

• Heavy-duty automotive V-ribbed belt for accessory drive systems
• EPDM belt material for improved wear resistance and long service life
• Polyester cord material for strength and stability
• 8-rib design for proper pulley engagement
• OE Improved rating for an upgraded replacement fit
• Cross section K with 1.087 in. top width
• Effective length: 124.45 in. / 3161 mm
• Outside circumference: 125.21 in. / 3180 mm

Product Details

Gates FleetRunner Heavy Duty Micro-V belts are engineered for heavy-duty drives where belt stability and durability matter. The EPDM construction helps the belt maintain flexibility and resist wear under continuous accessory loading, while the polyester cord supports dimensional stability. The green overcord identifies the FleetRunner heavy-duty line and reflects the belt’s focus on fleet service and reduced downtime. Part number K081244HD is also referenced in the aftermarket under 8K1244 and 8PK3160 for the same application.

This part cross-references 8K1244 and 8PK3160 for the same application.

What This Belt Helps Address

• Squealing or slipping from a worn serpentine belt
• Cracking, glazing, or fraying on the belt surface
• Loss of accessory drive consistency on high-load systems
• Reduced belt stability in heavy-duty fleet service
• Replacement needs on Ram 2500 and Ram 3500 single-alternator setups

Installation Notes and Tips

Verify pulley routing and belt length before installation. This belt is specified for Ram 2500 and Ram 3500 models with a single alternator, so confirm the vehicle’s accessory drive configuration matches the listed fitment before ordering. Inspect idlers, tensioners, and pulleys for wear at the same time, since worn components can shorten belt life. K081244HD should be installed on clean, aligned pulleys to help maintain proper tracking.

Quality Assurance

Gates FleetRunner Heavy Duty Micro-V belts are built for heavy-duty service with EPDM construction and OE Improved specification. The product line is engineered to support durability, flexibility, stability, and longer service life in fleet applications.

Fitment

• Fits 2022-2025 Ram 2500, N/A, with single alternator; FleetRunner Heavy Duty Micro-V Belt
• Fits 2022-2025 Ram 3500, N/A, with single alternator; FleetRunner Heavy Duty Micro-V Belt
• Fits 2019-2021 Ram 2500, N/A, compatible with vehicles equipped with a single alternator; FleetRunner Heavy Duty Micro-V Belt
• Fits 2019-2021 Ram 3500, N/A, compatible with vehicles equipped with a single alternator; FleetRunner Heavy Duty Micro-V Belt