I know, I know! I said I'd post on Monday's. But this is a special report that will hopefully prevent possible "man-sausage" damage!
I recieved a question from "Anonymous", concerning a chain replacement that resulted in a "skipping" that can't be dialed out by tuning the derailluer. A potentially dangerous situation if the skipping were to occur while hammering out of the saddle! Yeeeow! Instant Barry Gibb!
Since the consequences of not answering this question until Monday were so great, I just had to respond immediately. The world doesn't need another falsetto male pop star! (Besides, I always HATED disco!)
The answer is rather simple. Your chain, (the old chain that broke), was all nice and comfy with the cassette cogs and chainrings it was "mating" with all these miles. Suddenly, the love triangle was broken! A new chain was introduced. The cassette cogs and chainrings did not "mate" well with this new interloper. Things were not "meshing" well. The old cogs and chainrings were laidback, loose. That shiny new chain is all uptight 'n stuff. So, what's the ol' cogs and chainrings do? They kick that bee-otch every chance they gets!
What I say: Please, do not change "just" a chain if you've been running a mtb drivetrain for months in dirt, grime, and unimaginable spoo. As much as you may protest, your bike will win!( and we'll have another high-pitched whiner to deal with!) Change that chain, cassette, and your middle chainring. Well, if you use the middle chain ring the most, change it. If your using the big ring all the time your either a poser, have hateful knees, or your Tinker Juarez!
You may change "just" the chain "if" you do it often enough to avoid all those parts wearing in with each other. Get a chain checking tool, learn it, use it! Park Tools bro!
Ova 'n outta hee-ah!