Beyond MegaRange: Extending 7-speed Cassette Range?
I'm wondering if the range of a Shimano Tourney 14t-34t cassette/freewheel -- with a single chainring -- can be expanded.
Are there bigger cogs than 34t (and derailleurs that can shift to them)?
Sheldon Brown describes something complicated about special hubs being needed for 11t cogs. Does that apply also to 12t and 13t?
I notice that Shimano's own 7-speed 11-34 cassette and freewheel were discontinued. Is there something inherently problematic about this configuration?