11.5" / 292mm diameter. Floating. 56.3mm I.D.; 8.7mm (5/16") counterbored mounting holes. 3.25" bolt circle mount holes. Mount style ''B''. Note: Mounting holes are fitted with 5/16" inner sleeves. With the reducer sleeves removed mounting hole diameter is 3/8"; for rear use. Note: Can be used on pre-2000 models when a 56.3mm to 50mm I.D. reduction ring is used. Brake rotors are manufactured from a special stainless steel alloy and are heat treated. This offers an excellent braking capability with high wear resistance. The material is laser-cut for perfect precision and cross-grind for a perfectly flat surface. Optimized for OEM radial calipers. Note: With approval. Check your local MCS dealer or the MCS sales department for exact type of approval and validity on bike model and years on the test report. OEM replacement reference 44156-00; 44136-00.- Manufactured in OEM quality - Perforated braking surface for reduced noise and good responsiveness - Extremely heat resistant; offering stable braking performance under all conditions - High responsiveness due to increased brake grip - Optimized for OEM; accessory and radial calipers - High-strength stainless steel inner part for increased durability with minimized distortion and fading - Suitable for all common brake pads