KMC X12 12 Speed Chain - Black C-class In simple terms it’s a

In simple terms it’s a “wax” based water emulsion

Bottom Bracket Shell I

durability and real-world reliability

2 COF (coefficient of friction) in very humid air

KMC X12 12 Speed Chain - Black C-class In simple terms it’s aKMCs latest breakthrough in chain technology. Our new 12 speed compatible chain out performs the competition in every aspect! One Chain for All 100% compatibility on all leading derailleur systems. Asymmetrical chamfering avoids interference. Impeccable precision. Phenomenal shifting performance. Compatible with SRAM & Shimano 12 Speed Eagle MTB or Campagnolo Road 12 Speed Drivetrains Specifications 1 2" x 11 128" 126 Links Silver 12 Speed Hi