Kmc z610 single speed hx chain a chain that is compatible with a range of bikes compared to other renowned chain brands kmc x series chains live longer as proven in many road tests to back up this claim kmc is the only chain manufacturer offering a unique satisfaction warranty features 12 x 332 112 links pin length 80 mm anti drop design stretch proof treatment heavy duty structure mushroomed riveting quiet functioning inner plate chamfering smooth transmission high pin power reinfo