I currently drive a Ford Focus 1.8 TDCi sport which comes with 16 inch alloys, offset ET 52.5??

I am looking to change these for some ST alloys, 18 inch, offset ET52.

will these go onto my car relatively problem free? Cheers.

p.s. Nice to meet you forum.

As long as the bolt patter is, they should fit right up. I'm guessing the 18's might be a little wider, that might cause fitment issues.