Steel Rear SprocketComputer designed to achieve ultimate strength at minimum weightJT combines leading-edge technology with top materials to produce the ultimate quality sprocket range with unbeatable valueMade with top-quality-grade C45 high-carbon steelSprockets are heat-treated and bead-blasted to reduce material surface tensionEvery sprocket meets or exceeds the highest possible quality standards set for the motorcycle industryRequires use of adapter 1211-0326.