Replacement Flattop chain for Sram Red E1 12sp drivetrainsFlattop technology enables a narrower chain with quieter operation and increased strength and durabilityHard Chrome plated inner link plates and rollers for reduced wear and prolonged lifeHollowPin construction for increased strength and efficiencySuper-light outer plates with cut-out design13g lighter than previous RED chain12sp1/2x3/32126LRainbow249gUPC/EAN/GTIN: 710845909146