Computer designed to achieve ultimate strength at minimum weightJT combines leading-edge technology with top materials to produce the ultimate quality sprocket range with unbeatable valueEvery sprocket meets or exceeds the highest possible quality standardsSprockets are heat-treated and beadblasted to reduce material surface tensionFront sprockets made with top-quality Japanese C45 high carbon steel and SCM415 chromoly steel alloySteel rear sprockets made with top-quality Japanese C45 high carbon steelAluminum rear sprockets are made with high strength Austrian 7075 T-6 anodized aluminumJT aluminum sprockets are about 30% lighter than a comparable steel equivalent, which reduces un-sprung rotating weight and improves performanceNew lightweight front sprockets available for some applications NOTES:When installing sprockets which differ from the OEM size, check for proper clearances before operating.