I’ve got some bikes with coaster hubs and I seem to coast down hills significantly faster than riders on ratcheting hubs when I ride with them. Of course that could just be that I weigh more but I’ve noticed it being more pronounced when I’m riding a coaster than when I’m riding a ratcheting hub.
If you mean single speed coaster brake hubs, it makes sense.
They are all essentially copies of the original Sachs Torpedo design - a roller bearing clutch on a screw shaft (the Torpedo). They have essentially zero drag when coasting.
I’ve got some bikes with coaster hubs and I seem to coast down hills significantly faster than riders on ratcheting hubs when I ride with them. Of course that could just be that I weigh more but I’ve noticed it being more pronounced when I’m riding a coaster than when I’m riding a ratcheting hub.