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 set for the motorcycle industry Sprockets are heat-treated and beadblasted to reduce material surface tension Front sprockets made with C45 steel and SCM415 chromoly steel alloy; rear sprockets made with top-quality-grade C45 high-carbon steel