I ordered 16" alloys with TPMS sensors and winter tyres 2015/65R16 from my Toyota dealer.
Was looking for aftermarket alloys and tyres at performancealloys.com but decided to order genuine ones because performancealloys will charge me 200 euro for delivery.
At PA site they sell alloys by Team Dynamics that have center bore made by your specifications after ordering. Most of the aftermarket wheels have larger center bore and i prefer not dealing with spigot rings.
If you go with aftermarkets, look at owner's manual for wheel and tyre sizes.
I am surprised that you found at a Toyota dealer 16 inch winter wheels.
In Belgium minimum size is 17 inch.
I also went for the dealer offer, what I could find online with TPMS sensors, tyres + delivery + installation, the total price was pretty close, so went for the easier way, dealer offer.
The 16" rims i ordered are looking good in my opinion. Coupled with tyres not too good because of the odd looking 215/65R16 size but 17" and 18" are so expensive. You can ask your dealer for 16 and see what they will say.
I will post photos when i get it.
HKP, based on your list of cars you've got enough space to store spare alloys/tyres.
Am simply going to have a set of Michelin Cross Climate+ fitted to my existing alloys, going for all weather as there'll be no rush to change them back....plus my local tyre fitter charges me just £25 to swap them over.
Natch as using my alloys for their first winter will ensure they are well cleaned and waxed (usually Collinite 845)
What may be useful is to know any alloys in the toyota range that fit the C-HR perfectly...it would make hunting for new or old alloys much easier