BikeMaster 520 BMZR Series Z-Ring Chain Black/Gold 120 Links Specifically developed for todays extreme high performance sport machines from 1000cc to 1400cc. Available up to 160 links for extended swingarms Finest crafted components assisted with special seal ring with factory grease and round rivet head provide superior rigidity to insure the best performance to meet todays high performance sport machines High tensile steels used throughout the chain components. Larger pins means loads spread out over wider area, longer life, and more strength