Originally Posted by
sdimattia
That said, the lowest possible gearing a single speed bike can run is a 1:1 ratio, though you might have a hard time finding a cog and chainring that have the same number of teeth.
I don’t fully understand this statement. I agree it would a bit of doing to find actual SS cogs as big as typical chainrings, but there are some pretty small chainring options and I can’t see why there would be any particular reason why the ratio couldn’t be lower than 1:1 just because it’s SS.
OTOH, I would hard pressed to picture a 27” gear being an optimal choice for SS! 😊
Otto