KMC chain X 12 aurora blue 126 links waxed. Thanks to KMC GO CHAIN WAX's innovative formula, premium KMC chains treated with our wax offer unparalleled durability in addition to high efficiency. Compared to oil-based lubricants, waxed chains are less susceptible to dirt buildup, increasing drivetrain life and shortening cleaning intervals. 12-speed, 1/2" x 11/128" Non-directional, high-precision chamfers for excellent shifting performance, with X-Bridge, finish: Ti-N gold/black, Ti-N gold, nickel-coating or EPT technology, MissingLink "12NR Ti-N" gold or "12NR EPT" silver, 268 g Number of chain links 126 pcs. Width 5.2 mm Width inch 11/128 " Pitch 1/2 Main color blue Incl. connecting link yes Manufacturer color name aurora System compatibility 12-speed Type/kind Item Type shifting system derailleur gear