Originally Posted by
hoodat
Correct me if I'm wrong but I believe those new hangers are purposely designed to break under stress to prevent worse damage.
True, they work as a fuse of sorts to limit damage or isolate it in a replaceable part.
However once it breaks the bike is unusable as it is. An argument could be made for then being able to cut the chain, remove the derailleur and cobbling the bike as a rideable single speed because the the wheel wasn't damaged.
Of course an argument could also be made for a single speed in the first place which would not have the problem in the first place.