Apex Flattop Chain - 12-Speed, 120 Links, Gray, D1 Flattop technology is so much more than a distinctive look. It allows SRAM&';s 12-speed chain to be lighter, stronger and more durable than anything that came before. The Apex chain uses the same construction as the Rival and Force chains, with a polished gray finish. Key Features Optimized for use with SRAM&';s Apex 12-Speed drivetrain Flattop technology allows for a narrower chain with quieter operation and increased strength and durability Includes Flattop PowerLock connector Chrome Hardened pins provide additional durability