The ultralight EBC Brakes X series 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 EBC Brakes S-Drive rivet system, which includes square side rivets that allow for thermal expansion of the braking track, enabling it to expand and contract freely during braking without the rivets locking.