MTX Performance Brake Disc. WR-F 250 4T Reverse Cylinder 15-22. YZ-F 250 270mm Disc 16-21. YZ 250 FGY 60th Anniversary Edition/270mm Disc 16. Solid discs. YZ-F 450 270mm Disc 16-21. Lightening and drill hole patterns are applied as per OEM specifications to improve braking performance and reduce the discs temperature during use.