What size wheel nuts do I need?

For a standard seicento sporting, I'm thinking about abarth covers for the standard alloys.

I think like this;



4 x 49mm Abarth Wheel Centre Badges? According to abarth badges is that correct?

I'm really not sure what you're talking about or what the relevance of the photo is.

If you're talking of fitting Sei Abarth wheels (IMHO not a great choice as they're only 5.5J and tyres are bloody expensive) you need 10mm hubcentric spacers at the front only. So -- miracle of miracles -- you need 10mm longer wheelnuts (which should have a suitable taper for the Abarth wheels). On the back -- presuming alloys -- they'll be the same length.

But wheelbolts are for monkeys: get a stud conversion.

If you just want to fit centre caps, measure the ones you have and get the same size!

sorry the photo was to show what type of wheels I have, I'm talking about the centre caps.