But how long do you tend to run them for? I run KMC K810's on both my trials bikes (and used to run a K710 on my BMX) and have never had one snap. However, because I like my teeth the way they are, I always change my chain at least every 6 months, generally every 3-4 months probably. Overkill I know but it's better to be safe than sorry kids . Oh yeah, and I'd never run a KHE because, although in theory stronger than a KMC, the appear to be a bit, well, pants as far as design and function goes.