Unique link shape allows the chain to be narrower and lighter while increasing strength and providing more tolerance between cogs. Flattopâ„¢ technology enables a narrower chain with quieter operation and increased strength and durability Hard Chromeâ„¢ plated inner and outer plates for faster and more precise shifts HollowPinâ„¢ construction for increased strength and efficiency SRAM Model ID: CN-RED-D1 
