World-class professional racers have proved that KMC chains provide the right DNA to get through the championship. It is important to offer a chain for all kind Of riders. KMC 9 Speed chains are compatible with all major shifting systems. Shifting performance, durability and easy mounting are other key words for KMC chain. we have the Perfect chain for all type of riders. * 1/2" X 11/128" - 114 links, pin length 6, 6 mm * compatible with: any 9-Speed derailleur system * Titanium nitride gold coating * nickel plated Silver coating * hi-performance * double x-durability *open inner plate; less chain suck ** "Tear yourself away from the usual Shimano or SRAM and you Will find some Gems on the market such as this KMC item. If you Fancy A reliable change then this could be it 9/10" - may-09 what mountain bike.