So youve finally worn out your chain, huh? Now the real fun begins, trying to figure out how to replace the dang thing without stripping the threads on your derailleur or breaking the chain tool. Seriously though, whats the best method for replacing a worn-out chain on a road bike while minimizing the risk of screwing up the rest of the drivetrain? Do you guys recommend using a chain breaker specifically designed for use with 11-speed or 12-speed chains, or will the old Park Tool CT-3 still get the job done? And whats the deal with these fancy quick link systems - are they really worth the extra cash, or just a bunch of marketing hype? Is there any difference between Shimano, SRAM, and Campagnolo chains in terms of wear life and ease of replacement? And can someone please explain to me why chains always seem to break at the worst possible moment - is it just bad luck, or is there something I can do to prevent it from happening in the future?