Wolf Tooth Components 36t 120bcd Drop-Stop Chainring for SRAM 2x10 Cranks, Black Not compatible with 9 speed chains Made from 7075 Aluminum for durability This chainring is threaded and requires the stock chainring bolts that came with the crank Features Wolf Tooth's Drop-Stop tooth design for maximum chain retention Optimized for use with 10, 11, and 12 speed chains