>>980546>what possible use it could haveUrban cyclists, who enjoy riding fixed and enjoy occasionaly coasting too, having the option to switch the hub mode with a shifter or something.
A coaster brake hub sure let's me coast and let's me do skidzz, but it's missing out the above.
>>980998Geared fixed hubs are a thing already
http://www.sheldonbrown.com/asc.htmlAnd this too
https://www.sram.com/truvativ/products/truvativ-hammerschmidt-am-cranksetI don't see why it would be impossible to engineer a hub, be it multi- or single-speed, which would have the option to be instantly switched to coast/freewheel mode (and back) too.