Any chain has to be breakable or it couldn't be installed on your bike. I'm not aware of any difference in HG in this regard. But I wouldn't try a master link on a HG unless it was specifically made for that chain. The HG links are beveled in specific ways. Keep using the old chain tool. Regarding master links, it's an old idea that's been recycled. Used to be that only 3-speed and single-speed bikes used master links. How many times did people come into the bike shop in the 70s asking for master links, and we'd reply "Master links don't work on 10 speeds (ie. with derailleurs)".Originally Posted by SnappyPix



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