I don't know for certain if this is actually going to be useful to anyone here, but I feel I should spread it regardless. If you know anyone who has a manual wheelchair - the ones with the big wheel you can push, rather than the stick that drives it? - during winter, I'd absolutely recommend getting them like a little bag of zipties.
See, when it's icy out, it's commonplace for wheelchair-users to end up stuck indoors unless they go out of their way to buy specialised snow wheels for them, and they're like, a few hundred quid. No point doing it when you can think around it! If you tie some zipties around the wheel itself - like, around the spoke and the tire - you can effectively turn any wheel into a rudimentary snow wheel for about a fiver, tops. Try at least once every three spokes and you should be all good. (Also, if using the chair indoors and outdoors, it might be useful to get some socks over the ziptied wheels. They're also cheap, but they run less risk of tearing up carpet or lino or whatever.)
Spread this, if you can. We've just had an awful cold snap here in the UK and while I don't personally know anyone who uses a manual wheelchair it feels like the kind of information that should be more widely available.