Rear Sprocket, 42 Tooth. Lightweight rear sprocket.

• Computer designed to achieve ultimate strength at minimum weight
• JT combines leading-edge technology with the top materials to produce the ultimate quality sprocket range with unbearable value
• Every sprocket meets or exceeds the highest possible quality standards
• Sprockets are heat-treated and beadblasted to reduce material surface tension
• Steel rear sprockets are made with top-quality Japanese C45 high carbon steel
• Manufactured from the best materials with a special self-cleaning design, and hand-finished to perfection