11.8" / 300mm diameter. Floating. 56.3mm ID; 10.2mm (3/8") counterbored mounting holes. 7mm thick. Mount style ''B''. 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. 7mm thickness of the brake disc ensures significantly better braking performance and optimized heat dissipation. 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. - Optimized for OEM brake calipers- Manufactured in OEM quality - Perforated braking surface for reduced noise and good response behavior- Extremely heat-resistant; therefore stable braking performance under all conditions- High responsiveness due to increased braking grip- High-strength stainless steel inner part for increased durability with minimized distortion and fading - Black powder coated inner carrier - Suitable for all common brake pads OEM replacement for 41810-08; 41810-08A; 41810-08C.Note: Not compatible with OEM 44080-08 caliper as used on 08-11 Touring. Compatible with OEM 44080-08B; 44080-08C brake caliper as used on 12-up Touring models only. Not for use with aftermarket brake calipers.