It's called a fixed gear bike. Move the gearing/transmission to the
hub/motor before the chain and it would work (a.k.a. a motorcycle...)
Fixed freewheels are easy, but I've never seen a variable locking one,
nor a "locking" derailleur.
Jay
On 4/5/22 20:01, Lawrence Rhodes via EV wrote:
This could be possible with derailleur and freewheel locking. I wonder if this
exists? Lawrence Rhodes
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