Kmc x9 super light 9 speed chainworld class professional racers have proved that kmc chains provide the right dna to help you become a champion as well as our champions it is important that we offer a chain for all kind of riders kmcs 9 speed chains are compatible with all major shifting systems shifting performance durability and easy mounting are other key attributes of kmc chains features 12 x 11128 116 links pin length 66mm compatible with any 9 speed derailleur system slotted p