Sprocket Rear 37T 520 Jtr1760.37Rear SprocketManufactured from the best materials with a special self cleaning design, and hand finished to perfection 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