Beringer's world renowned Cast Iron braking rotor. The rotor itself will add great performance to any brake system. When matched with Beringer caliper, pads, and master cylinder, you will have the top of the line supermoto brake system. Aeronal Rotor - K14L 320mm supermoto racing rotor. Completely rebuildable. Every component is available: inner hub, to floaters, to the outer ring. Cast iron or stainless steel outer braking ring available. Cast Iron can withstand very high temps and contributes to a great feeling brake. This is what Beringer is known for and is the most popular choice. Stainless Steel offers less "bite" for situations like rain racing, and also comes in at a lower price point. Multiple colors available including anodizing, plating, and polished finish. Not compatible with most stock brake calipers due to the thicker braking ring. For use with 4-6 piston supermoto calipers.