Dayco 5060858 | Serpentine Belt

Part Number
Serpentine Belt

Fits: 94-95 Mercedes-Benz C280, 98 Ford Ranger, 00-03 Ford Ranger, 00-03 Mazda B3000, 08-09 Freightliner Century Class, 08-09 Freightliner M2 112, 08-09 Kenworth T800, 08 Kenworth W900, 08-11 Peterbilt 365, 08-11 Peterbilt 367, 08-11 Peterbilt 384, 08-10 Peterbilt 386, 08-10 Peterbilt 387, 08-11 Peterbilt 388, 08-10 Sterling Truck L9500, 08 Sterling Truck LT9500, 09-10 Freightliner Columbia, 09 Kenworth T660, 09 Sterling Truck A9500, 15 Western Star 6900XD

Special Price $28.85 Regular Price $33.94
In stock
Only 4 left
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Estimated Ship Date: 1 Business Day or Less
Designed for high mileage multiple-accessory drivesthe Dayco® “W” profile belt (patent pending) is the most innovative advancement in multi-rib belt design in over 25 years. Developed through extensive laboratory and actual road mileage testing, this unique rib profile has been specifically Dayco® engineered to conform to high mileage, worn or misaligned drives without a sacrifice in quiet, long-lasting performance. The "W" profile cut into the tip of each rib makes the tip more flexible and eliminates belt chirp when the belt enters a worn or misalligned pulley. Constructed with Aramid reinforced EPDM compounds, the Dayco® “W” profile belt delivers more than OE required delivers the solution to troublesome drive problems. Dayco® Poly-Rib® Belts meet or exceed SAE J1459 and SAE J2432 specifications.

BRAND: Dayco




Cross SectionK-Section
Effective Length85.75
Effective Length2178.05
MaterialEPDM, Aramid Reinforced
Maximum Operating Temperature100
Maximum Operating Temperature212
Minimum Operating Temperature-42.7
Minimum Operating Temperature-45
Outside Circumference86.31
Outside Circumference2192.28
Rib DepthStandard
Rib ProfileStraight Rib
StandardsSAE J1459, SAE J2432
Top Width.82



  • ACDelco: 6K858
  • CARQUEST: K060858
  • Gates: K060858
  • CARQUEST: K060858HD
  • Gates: K060858HD
  • Freightliner Trucks: 01-30884-175
  • Dynacraft: D84-1000-6062175
  • Ford: F77Z-8620-VA
  • NAPA: 25-060858
  • ACDelco: K060858HD


  • 2009-2009 Sterling Truck A9500 - Position: Alternator
  • 2000-2003 Ford Ranger - Position: Main Drive
    • w/o A.C.
  • 2008-2008 Kenworth T800 - Position: Alternator
  • 2008-2009 Peterbilt 386 - Position: Alternator
  • 1998-1998 Ford Ranger - Position: Main Drive
    • w/P.S., w/o A.C.
  • 2010-2010 Peterbilt 387 - Position: Alternator
  • 2008-2008 Sterling Truck LT9500 - Position: Alternator
  • 2009-2009 Kenworth T660 - Position: Alternator
  • 1994-1995 Mercedes-Benz C280 - Position: Main Drive
    • To Eng. No. 034966
  • 2000-2003 Mazda B3000 - Position: Main Drive
    • w/o A.C.
  • 2008-2010 Peterbilt 388 - Position: Alternator
  • 2008-2009 Peterbilt 387 - Position: Fan and Alternator
  • 2008-2011 Peterbilt 384 - Position: Alternator and Idler
  • 2008-2008 Kenworth W900 - Position: Alternator
  • 2009-2009 Freightliner M2 112 - Position: Alternator
  • 2009-2011 Peterbilt 367 - Position: Alternator
  • 2009-2009 Kenworth T800 - Position: Air Conditioning
  • 2008-2010 Sterling Truck L9500 - Position: Alternator
  • 2008-2011 Peterbilt 365 - Position: Alternator
Customer Questions
Can a serpentine belt cause smoke?
Yes, a serpentine belt can cause smoke. A serpentine belt is an essential component of a vehicle's engine system. It drives various accessories such as the alternator, power steering pump, water pump, and air conditioning compressor. If the serpentine belt becomes worn, damaged, or misaligned, it can cause friction and generate smoke.
Why is my serpentine belt squealing?
The serpentine belt can squeal due to various reasons, including tension issues, worn-out belt, or a problem with the belt's pulleys.
Is my serpentine belt too tight?
If your serpentine belt is causing issues like excessive noise or accelerated wear on the pulleys, it may indicate that the belt is too tight.
Why did my serpentine belt come off?
Serpentine belts can come off due to factors such as belt wear, improper tension, misaligned pulleys, or a faulty tensioner.
Please, mind that only logged in users can submit questions

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