Steel brake disc from Shimano, suitable for center lock mounting. To be used with resin brake pads. Specifications: Color: silver, black Material: stainless steel Type of bike: ATB, MTB Diameter: 180 mm Number of holes: 6 holes Crank hole: 35 mm Thickness: 1.5 mm Weight: 320 grams Mounting: center-lock Contents: 1 Brake disc 1 Lockring