SRAM Red FlatTop E1 Chain Speed: 12 Links: 114 MulticolorHollowPin construction is lighter and stronger than a solid pin, and cutouts in the outer and inner plates drop 13 g from the previous generation. Flattop technology enables a narrower chain with quieter operation and increased strength and durability Hard Chrome plated inner link plates and rollers for reduced wear and prolonged life. SRAM Model ID: CN RED E1 Specifications: Speed 12 e Bike approved No Primary Color Multicolor Link Type Powerlock