Hi Cossy,
The BBSCH are virtually identical in weight to the Pescara's. The CK's will be a similar weight too.
The CH link above gives an offset of 50mm, so even these will stick out 7.25mm more than the Pescaras. They will fit with no issues though
How to work out how much alloys will stick out further to stock.....
Stock offset is ET51, which means that the alloy hub face is offset by 51mm from the centreline of the alloy.
For every unit that the ET drops from 51, the wheel will stick out an extra 1mm
For every 1/2inch that the alloy is wider than stock, the alloy will stick out 6.25mm.
So...eg
The stock alloy is 7.5" wide and has an offset of 51.
so, an alloy that is 8" wide and ET51 will stick out 6.25mm more
an alloy that is 8" wide and has an offset of 44 will stick out 6.25mm for the extra width and then 51-44=7mm extra on top of that for the (ET) offset difference.
HTH