Specification AutomotiveFitType : universal_fit Brand : SHIMANO BulletPoint : ▲Brake System: Mechanical Disc Brake System with 2 aluminum front and back caliper(51mm), 2 of stainless steel 160mm Rotors, 2 sets of 6 bolts BulletPoint1 : Material: [core] aluminum, [braking surface] stainless steel, [lock ring] aluminum BulletPoint2 : Attachment Type: centerlock BulletPoint3 : Compatibility: Shimano XTR M9100 and M9120 calipers, Shimano Ice-Tech brake pads BulletPoint4 : Diameter: 140mm, 160mm, 180mm, 203mm BulletPoint5 : Includes: lockring Color : Gray/Black CompatibleWithVehicleType : Bicycle ExteriorFinish : Stainless Steel ExternallyAssignedProductIdentifier : 5007732310358 ExternallyAssignedProductIdentifier1 : 192790504827 ExternallyAssignedProductIdentifier2 : 0192790504827 FitType : Universal GpsrSafetyAttestation : 1 IncludedComponents : Bike Disc Brake Kit IsAssemblyRequired : 1 ItemDisplayDimensions_Height : 2 inches ItemDisplayDimensions_Length : 9 inches ItemDisplayDimensions_Width : 10 inches ItemDisplayWeight : 1 pounds ItemName : Shimano XTR RT-MT900-L Disc Brake Rotor - 203mm, Center Lock, Silver/Black ItemPackageDimensions_Height : 22.86 centimeters ItemPackageDimensions_Length : 3.048 centimeters ItemPackageDimensions_Width : 20.066 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : bike-brake-rotors Manufacturer : Shimano Material : [core] aluminum ModelName : RD-01B-X ModelNumber : Shimano NumberOfItems : 1 NumberOfLithiumMetalCells : 1 PartNumber : IRTMT900LE ProductDescription : Designed to keep your braking system cool on long, demanding descents, the XTR RT-MT900 Centerlock Disc Rotor rapidly dissipates heat for more consistent braking performance in extreme conditions, as well as longer pad life and reduced brake fade. These rotors are optimized for the XTR M9100 and M9120 brakes, and feature a new design that improves cooling and decreases weight compared to the previous version of the XTR rotor, the RT-99. Employing Shimano's Ice Technologies Freeza construction, these rotors use a 3-layer design consisting of two steel braking surfaces sandwiched over an aluminum core. This allows Shimano to take advantage of the high thermal conductivity of aluminum, whereas most companies simply use steel rotors. And thanks to a new heat dissipating paint on the exposed parts of the aluminum layer, the RT-MT900 rotors see their surface temperature cooled by up to 20-degrees Celsius compared the previous XTR RT-99 rotors. The 140mm and 160mm sizes are optimized for XC and focused on weight reduction, whereas the 180mm and 203mm rotors are made for aggressive trail and enduro with an emphasis on efficient cooling. ProductSiteLaunchDate : 2013-03-31T00:00:00.000-07:00 Size : 203mm SupplierDeclaredDgHzRegulation : unknown SupplierDeclaredHasProductIdentifierExemption : 1 UnspscCode : 25170000 WarrantyDescription : 6 MONTHS