Product Details: Update your semi with a smooth surface for roller bearings, with the NTN 1.57" Steel Tapered Roller Bearing Cone that ensures you're Ready for the Road Ahead™. Due to its cone-shaped design, this replacement piece is able to help reduce the amount of friction between two mechanical components. Constructed with super durable case carburized steel materials for improved reliability. FleetPride is your First Click in Heavy Duty®.