CHAINRING OR8 THRUSTER 110mm 42T 10/11s 5B BK110mm 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. Item Specifications: Material, AL6061, Type, 1x, Color, Black, Mount Compatibility, 110mm 5-Bolt, Chain Compatibility, 10/11s, Tooth Type, Narrow/Wide, Teeth, 42T,.