PLaMar

Hi I recently bought a 2003 is300 it came with 225/40/18r tires on all 4. i wanted to try and find a tire that would give a little bit wider of a look. oh also my car on coil overs i was wondering if 235/40s or 245/40s would fit and if so what would be the best size and i only want to put bigger tires in the back and keep 225s in the front
Thank you
-preston