JT Sprockets (JTSK3009) 525Z1R Gold Chain and 17 Front/41 Rear Tooth Sprocket Kit Fits: Suzuki DL 1000 V-Strom 02-09; 525Z1R Gold Chain and 17/41T Sprocket Kit Kit Contains: 17 tooth Chromoly Front Sprocket; 41 tooth Steel Rear Sprocket; and JT 525Z1R-112 Link Gold Chain SCM415 chromoly steel alloy is used for the front sprocket, and ultra-durable high carbon C49 steel for the rear sprocket JT Z1R Super Heavy Duty Chains are constructed with quad riveted pins for an extra strong rivet that resists powerful lateral forces on the extra thickness outer plates X-Ring seals are used for a better seal and produce less friction than conventional O-ring chains