Originally Posted by
base2
Neither Efneo or Schlumpf recommend their multi-speed, planetary cranksets for fixed use. They are ok with coaster brakes, however.
That's it - Efneo. It does seem like they recommend against using it with a fixed wheel - wonder why? But thanks for the Schlumpf mention - I had forgotten all about them and I am pretty sure that at least one of their drives was rejiggered and will work with fixed. Normally I'd goggle it to make sure but I don't want to fall into a multi-fixed rabbit hole, again.
Good luck - ride safe...