My cromodora alloys are SIX INCHES WIDE that is from lip to lip (total width) the 5.5 inches that you are trying to catch me out on is the internal rim size that the tyre sits in. The fact that it say Alfa Romeo is irrelevant.
Hum. I tried to be polite but apparently it was not clear enough:
The fact that it is written Alfa Romeo was relevant to find exactly which wheels you have - since you are clueless about it, it was necessary.
You do not have Cromodora wheels, check the relevant link, that is some other specific model. That was an example of common alloy on small Fiat.
What you think about your wheel size is completely meaningless. There is only one valid size of wheel width: the one WRITTEN on it. As seen in the picture, and said before:
We can clearly read 5.5 J x 13..
Do you know why the manufacter wrote it visibly there? To avoid confused people to try some weird measurement. To prevent people from doing what you did: telling a guy to buy 6.5" or 6" rims because you made some weird measurement of something sold in shop as 5.5" BECAUSE THAT IS THE MANUFACTURER REFERENCE.
And, to be clear, manufacturer reference is tied ETRTO rim width definition
http://www.etrto.org/It is not something you can reinvent here, on the spot. You can easily document yourself about it:
http://www.tyresizecalculator.com/wheels/wheel-markingsThe original question that NathanMcM asked was if a 13x5 inch wheel or a 13x5.5 inch wheel would fit and what size tyres would fit without rubbing. There was no talk whatsoever about using a 12 inch wheel. Now because I didn't know if Nathan was talking about a wheel that is 5.5 inches in total or a wheel with an internal size of 5.5 inches
And that should tell you that you have a serious understanding problem: if people wants to buy rims, we talk with MANUFACTURER REFERENCE, not with odd homemade measurement that no one cares about because it is completely irrelevant.
Rims are not sold with Gadge-from-the-forum references but the one the manufacturer wrote.
Now about legality because I'm getting really confused here. My car is NOT ILEGAL. You are not an expert in th UK laws regarding car road worthiness and are NOT in a position to give seemingly "expert" knoledge on the subject only opinions. My car passes its annual MOT every time and will in the future with these wheels fitted. They are well within the limits of the wheel arch and each axle has the same size fitted. Please do not tell me my car is ILEGAL again.
Re-read. As I wrote: "Ok, so Gadge, the good news is that your mount is perfectly legal.". What was not is what you said you had (165/... tyres on a 6" width rim), but I found out later that you were just very confused about how rims width are really measured.
(and you asked why I mentioned 12": because that is the standard mount on 126 except a Bis like yours; so that is evidently the reference ratio except for a Bis - the one that could be checked against in a serious MOT)
So now I shall go back to square 1. Nathan if you are haven't lost the will to live yet yes you can fit a 5 inch wheel or a 5.5 inch if you wish - that's total rim size by the way. So if your rim says 5.5j then you have a 6 inch rim.... and on that 6 inch rim
Haha. That's great: if your rim (meaning: the manufacturer wrote) says 5.5J x 13 then it is 6J x13 according to Gadge-from-the-forum reference. But will the seller use manufacturer reference written on the wheel or Gadge-from-the-forum own reference?
BTW, Gadge, if we get back to my real 6.5J x 16 rims mentioned earlier, what are they according in Gadge reference? I am curious! Would that be a 7J x 16 then?
It it also quite possible to lower your car on this set up about 30mm and still not suffer any arch rubbing. Take it from a guy who has actually done this with success rather than a guy who writes articles about it.
Another way to look at it: take it from a guy that failed repeatdly to even identify his own rims, despite clear marking on them, and since then try to justify how he advertised to go for 6.5" while he actually meant 5.5"? Even on your most recent posts,
you wrote "My cromodora alloys are SIX INCHES WIDE" while the wheels you have in your pictures are actually, manufacter reference,
BWA Campanatura 5.5x13.
Document yourself:
http://www.cromodorawheels.it/ is not
http://www.bwaauto.com.au/ You do not have Cromodora. That is a brand that did not produce the wheels you have. READ THE MARKINGS.
I'll stick to what I said earlier, 5" 155 should be fine with no alteration - which I think is a useful info.
And I think anyone should be aware now that any size or reference you give is questionable since you do not follow standard measurements (the one all manufacturers agreed upon).
And I feel gentle today so I wont even mention that you failed to mention ET (offset), which actually could matter a great deal to fit large wheels in a car not designed for
Real small fat tyre will be easier with a positive offset.
Beside the noise :
https://tiresize.com/comparison/http://www.willtheyfit.com/should give you real data you can actually use to have a clue about how different or similar the new wheels you intend to mount will be.
(beware, the rim width there is according to manufacturer reference, not Gadge-from-the-forum reference)