flowerbug
Garden Master
It's been a long time ago but I remember being out in -40° here.
yeah, up north some very cold winter evenings after the lake had frozen over. no more moderating of the extremes any longer after that happened so you'd get whatever the arctic north could deliver.
down here -20F - -25F is about the coldest i can recall but add wind chill to that and it can be worse.
as for all four tires going at once, if they were underinflated to begin with and then you had a very extreme cold spell that might do it. or kids pulling pranks, but when it gets to be that cold who wants to do things like that anyways? i'd be burrowing in a snowbank if it got to be that cold.