By that do they not mean its running 205/45 r16 tyres instead of 195/45 r16's ?
Or is it something totally different ?
Like the hubs or something ?
I was told the hubs are bigger like 5mm, so stick out further. The ET from the wheels on the 182 is different than the 172 Cup wheels so they sit further in. The wheels make up for the difference of the bigger hubs so the actual track is the same again.
I checked this out last time i almost wanted to fit the larger hubs to my 172 cup.. Changed my mind because then i would have had to put on the 182 wheels too to have correct tracking. I dont like the 182 wheels so kept it the way it is