Chainring 36T Silver (48X36X26T) for FC-M591/M590/M533-K Brand: Shimano Part No: Y1J898080 JAN Code: 4524667220664 Compatible Models FC-M591-S FC-M591-L FC-M591-L FC-M591-L FC-M591-L M590-S FC-M590-L FC-M533-SK FC-M533-LK FC-M532-S FC-M532-L FC-M521 Gear Mounting Pitch Diameter 4.1 inches (104 mm)