Kmc k710sl kool chain the kmc k710 chain is designed for heavy duty bmx freestyle and track bikes features os outer and tall inner plates for incredible tensile strength no stretching or chain drop xtra strong bulls eye pin rivets corrosion resistant 12 x 18 100 links pin length 95 mm compatible with bmx freestyle bikes nickel plated special dynamic configured plateskmc chainsfor many years kmc has enhanced the technology behind bicycle chains through research development continuou