SUMC chain is the top 3 bike chain supply in China. Offer high quality but cost effective chains for riders in worldwide. We wish all the riders can enjoy high performance chains with affordable price. Titanium Nitride Coating High stiffness and durable long life span. Compatibility： works for Shimano, Sram, CP, Lt-woo, Sensah, Micro shifter derailleurs and so on. SUMC chain Both inner and outer panels feature chamfered edges for improved shifting and chain articulation. In addition to performance features, SUMC's mushroom riveting technology increases the strength of the pins and makes the chain stronger. SUMC Chain also has a titanium nitride plated surface for improved wear and corrosion resistance. The actual test has a stable service life of 6800 kilometers! Service life ： 6000 KM + Need cleaning and maintenance miles: Every 500 KM

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