Kmc k810 kool 332 chain the kmc k810 chain is designed for heavy duty bmx freestyle and track bikes features 12 x 332 100 links pin length 77mm compatible with bmxfreestyle bikes narrow 332 nickel plated special dynamic configured plates os outer and tall inner plates for incredible tensile strength eliminates stretching and chain drop xtra strong bulls eye pin rivets corrosion resistantkmc chainsfor many years kmc has enhanced the technology behind bicycle chains through research