Kmc z72 78 speed chainthe kmc z72 78 speed chain offers you an excellent value for money option for replacing the chain on your 7 or 8 speed drivetrain it features many of the technologies seen on kmcs top models such as their z bridge shape outer links which give you faster and smoother shifting it also has mushroomed riveting for unrivalled strength features speeds 7 and 8 speed compatible 12x332 116 links pin length 71 mm chamfered inner plates to optimise shifting compatible w