Driven Racing Rear Sprocket 45T Black 5008-520-45T Size: Style: SPROCKETS Color: BLACK Warranty: All products returned must be in new, unused condition with all packaging and tags included. Once the items are ridden in or installed on the bike we are unable to take them back. The only exception to this would be defective items. (Please see Warranty Terms below). Eligible returns or exchanges must be arranged within 30 calendar days from shipping date.