Lisa - this is what information was written about ratio: ratios: original 2-speed bobbin 1:4 and 1:5.5 two added bobbins 1:6.5
I have no idea what that means, so if I'm answering your question wrong, I'm sorry. I will be learning to spin with this wheel (and if it's not a success - which I doubt - at least it will be an excellent decorative item). I jumping in with both feet eh?
They also wrote this about the wheel (which it what convinced me that I wanted it - they specialize in wheels):
"When I test drove this wheel I was pleasantly surprised. Being used to spinning on Louet wheels, I’m not easily impressed by the performance of other wheels, but in this case I was. It runs very smoothly and steadily. And apart from the normal rustling, it’s very quiet, no squeaking or grinding. The lady we bought it from was an enthusiastic spinner herself and she has taken very good care of the wheel.
The treadle covers the whole base, like the Fricke wheels, therefore you can treadle with both feet, or switch from left to right and give the tired leg a rest. There are four pegs in the wheel that function as skein winder. They can be taken out when spinning and put in again for skeining. "