JT Sprockets 520 Steel Rear Sprocket Honda Cbr250R JT Sprockets steel sprockets stand out for their durability and lighter weight, benefiting from advanced computer design and precision metal cutting technology. This innovational approach ensures a blend of high performance and reduced mass for the ultimate riding experience. Features: 520 pitch JT steel rear sprockets are made from C49 high carbon steel Heat-treated and bead blasted to reduce material surface tension