Sram: CENTERLINEThe CenterLine design provides a smooth, consistent, and quiet running braking surface. Rounded edges make for easier wheel installs and are UCI-compliant.THINGS TO REMEMBER• Compatible with both road and mountain bike brakesSPECIFICATIONSDiam (Rotor):  140mm, 160mm, 180mm, 200mmHub interface:  6-boltBolt material (RT):  SteelRotor Type:  Centerline