110mm BCD 5-bolt chainrings for Road, Cross, and Gravel applications Narrow/Wide tooth design for chain retention on 1x systems 10 or 11 speed compatible Forged and hard anodized AL6061-T6 alloy construction 110mm 5-Bolt 42T 1x AL6061 Black 10/11s Narrow/WideUPC/EAN/GTIN: 888571055519