Got a set of these this year, not wanting to have three years in a row where I've had to go to hospital because of coming off on the ice:
They do have a lot higher rolling resistance compared to normal tyres, but the grip is fantastic on un-gritted frozen roads and the motor assist means you don't worry about the extra drag.
They do have a lot higher rolling resistance compared to normal tyres, but the grip is fantastic on un-gritted frozen roads and the motor assist means you don't worry about the extra drag.