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Dayco® No Slack™ Idler/Tensioner Pulleys

Dayco's reputation for top performance idler and tensioner pulleys is a result of advanced automotive technologies employed in materials research, design engineering, and manufacturing of our pulleys. In addition to our spun steel pulleys, Dayco also provides specially formulated glass-filled polymers to ensure a high strength, wear-resistant plastic pulley designed to replace serpentine and V-belt idler and tensioner pulleys.

The use of state-of-the-art three dimensional computer aided design (CAD) and finite element analysis (FEA) guarantees the optimal design and maximum structural integrity for both plastic and steel pulleys. Pulleys with smoother surfaces and tighter dimensional tolerances translate into less vibration and therefore longer belt life. Lubricated bearings and high temperature seals assure peak performance, which is the most critical element of a pulley's service life.

Belt TypeSerpentine
Pulley Outside Diameter (mm)70.3
Pulley Width (mm)30
Max Belt Width06 Rib
Number of Bearings1
Bearing Inner Diameter 1 (mm)15
Bearing Width (mm)16
Alternate/OEM Part Number(s): 231173, 89173FN, 99610211852, 99610211853, 99610211855, 99610211856, 99610211954, 99610211957, 99610211958, 99710211800, 99710211900

Warranty Information:
12 Months/12,000 Miles