The Dayco 17mm Bearing Idler / Tensioner Pulley is designed to provide reliable performance for Kenworth, GMC and Chevrolet vehicles. This pulley is constructed from steel for maximum durability and offers a maximum belt width of 12 ribs. This pulley is designed to deliver consistent, trouble-free performance and is an ideal choice for replacing worn or damaged pulleys. FleetPride is your First Click in Heavy Duty®.