Originally Posted by
carleton
It's billed as "track/fixie"...the same as their lesser chains.
X means "long life"
HX means "heavy duty"
Unfortunately, it's tough to sort through their icons and marketing hype to tell the differences in the actual materials and construction.
The "Chain Guide" pdf lists the K710 as the strongest 1/2"x 1/8" chain in the lineup with 1300kg of break load. I'd go for that one.
http://kmcchain.us/wp-content/upload...ChainGuide.pdf
The specification table in this link gives "Pin Powers" of 200 to 350 kg. Any idea of a definition for "pin power"?