Just got a couple of U8 today. Not 18s but late 17s and they have the new upgraded brake system. I can see that the calipers and pads are bigger. The rotors are solid an the master is completely different. According to the update sheet, the knuckles, and disc guards are new in addition to all calipers lines and master. Should be together in a day or two. I will let you know how they feel.