Funn Solo Narrow Wide Chainring, for Uneven Pitch 4-Arm, PCD (BCD) 96mm, for Front Single (30T, Black)

Specifications: This wide-narrow chainring is compatible with Shimano's current crank standard (unequal-pitch 4-arm, 96mm BCD). Narrow-wide tooth tip: For single-speed chainrings, the teeth on the chainring are a combination of wide and narrow, providing firm support for the chain and reducing the risk of it dropping off. Material: CNC-machined 7075 aluminum alloy, a high-strength aluminum alloy known as ultra-super duralumin. Effective chainline: A step design around the bolt holes ensures efficient and accurate chain alignment. Suitable for 9- to 12-speed chains.