I'm swiss so I have a neutral view.
Chavs in Italy and Switzerland don't exist, there are neckbeards and metalheads (they often intersect), wiggers/rappers, normal people and guidos (truzzi or tamarri in italian).
Tracksuits are sometimes worn by wiggers and guidos (but only specific brands, and must be flamboyant with writings in gold over black etc., so it's not because they don't care).
Example of pants owned by 90% of native guidos:
And this:
this is the extreme of guidoness in Italy.
Most guidos dress well enough and keep care of themselves though, these are hardcore. Fact is, a great percentage of italians have at least one sign of guidoness to me, especially because of their bad sneaker taste.
My understanding of english chavs, is that they're race and music genre neutral but tend to be white, dress like shit, hang around in street corners and are proletarians out of a job / party too much and don't want a job / violent / drug dealers.
I think that wiggers are what most resembles those.