The ultralight series EBC Brakes X floating front MC brake discs have become one of the world’s lightest and best-performing discs since their introduction and are available for all modern sports bikes. The MC floating brake discs feature the exclusive and patented S-Drive rivet system by EBC Brakes, which includes square side rivets allowing the thermal expansion of the braking track, enabling it to expand and contract freely during braking without the rivets locking up.