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The all-new Sram Red chain was redeveloped from the ground up The unique link shape allows the chain to be narrower and lighter while increasing strength and providing more space between the outer plates of the chain and the cogs on either side. Result a quieter chain with faster more precise shifts. Features 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. HollowPin construction for increased strength and efficiency. Real weight 250 g. Technologies PowerLock Sram chain engineers developed PowerLock as a tool free sure and consistent way to connect their chains. While PowerLock does not require special tools for install the especially tight tolerances of 10- 11- and 12-speed drivetrains mandate that each PowerLock is good for a one-time application only. Flattop To enable X-Range gearing technology Sram developed a narrower chain. The unique link shape of Flattop technology not only allowed for a wider gear range but also results in quieter drivetrain operation and increased chain strength and durability.