JT Kettenrad 39T 520 BLK JTR823.39ZBKInduction Hardened Black Zinc Finish Rear Sprocket
Computer-designed to achieve ultimate strength at minimum weight
JT combines leading-edge technology with top materials to produce the ultimate quality sprocket range with unbeatable value
Every sprocket meets or exceeds the highest possible quality standards
Sprockets are heat-treated and beadblasted to reduce material surface tension
Made from C45 high carbon steel
Teeth are heat-induction hardened to 38-50 HRC