KMC X12 Chain - 12-speed - silver Combo Upgradable to triple wireless with

Upgradable to triple wireless with the optional heart rate sensor

10 54-559 Folding Black Black 560 200-380 30-55 RF6522TC-DV-B 27

PRS-21 (2012 and newer)

BR-T780 / LX BR-M600

KMC X12 Chain - 12-speed - silver Combo Upgradable to triple wireless withDescription : KMC's X12 chain offers best shifting performance, easy and safe assembly with a missing link, outstanding durability and light weight. KMC X12 series offers great advantages on your Shimano or SRAM 12 speed system. Features : Double X Durability: KMC's on going battle to prolong the chain's life makes KMC X chains your best choice for durability. With satisfaction guaranteed! X Bridge for faster and smoother shifting. MissingLink: Every