The PC XX1 Chain is a truly revolutionary product from SRAM. The incredible engineering that has gone into the creation of the PC XX1 allows for a gear range previously only possible for 2-chainring drivetrains. The Eagle chain links have a smooth radius with no chamfers or sharp edges, yielding a significant reduction in noise, friction and wear on cassette cogs and chainrings. The chain is also designed with a flatter plate, allowing for greater strength and a greater chain riveting consistency. The XX1 also incorporates HARD CHROME technology, offering incredible durability and a prolonged optimum performance life, and the Titanium Nitride coating further reduces friction and corrosion. The XX1 also boasts the all new Eagle PowerLock chain connector, which works to provide better chain guiding whilst improving durability and longevity.The SRAM PC XX1 Chain is a world class product, offering phenomenal performance and durability, a fundamental part of SRAM s new Eagle range.Ground-breaking chain design and technologyStrongest, quietest, most wear-resistant chain in the worldFLOWLINK technology PowerLock chain connectorHARD CHROME technologyTitanium nitride coatingSignificantly improves wear resistance on Eagle cassettes and ringsRecommended for use with the SRAM Eagle range12 Speed 126 Link.