Kinda hard to say what is considered "Durable". Are we talking frames or components? Components, well..are pretty self explanatory..u have the less expensive ones, they will fail. By brother had some low model Shimano component and the drerailer failed and wrapped around his spokes. Obviously, the higher end components of Shimano are far superior. As far as Frame..well..in HYBRID terms, they ALL should be durable enough to handle 95% of what an average Hybrid rider does. There are the 5% who put their bikes to the extreme..but most Alloy/Steel/Carbon frames on a hybrid should handle most people's needs.