15" x 1.181" replacement rotors for most 15" Extreme and Eradispeed1 GM Truck systems. , , Diameter: 15", Thickness: 1.181", Bolt Circle: 6 x 5.50" (139.7mm), O/A Height: 2.177", Register Diameter: 3.094", Available Finishes: Slot/Drilled/Zinc, Slot only or Plain , Drum in Hat: No, , Use this chart to determine the correct part number needed, then select part number and quantity below to order:, Rotor Position, Finish - Part Number: , Left, Slot/Drilled/Zinc - 6910962, Left, Slot Only- 6910959, Left, Plain - 6910957 , Right, Slot/Drilled/Zinc - 6920962, Right, Slot Only - 6920959, Right, Plain - 6920957 , , Notes: These rotors are directional and specific to the left or right side of the vehicle. If you are unsure on what rotor you need, please contact our sales department for assistance. Rotors sold individually.