Where do you live and what kind of climate do you usually have in the winter?
Renault recommends the ContiWinterContact TS800 for the Twizy, which are available in the “right” dimensions for the standard rims. According to tests and Continental these are design for “central european winters”.
However if you, like I do, live in northern Europe where the winters are harsh with a lot of snow and especially ice these aren’t really meant for that. The only tyres i’ve found classified as “North Euopean winter tyres” are the ContiVikingContact in either 155/70R13 or 155/80R13.
Maybe someone here knows the tyre width limit on the Twizy?