Oh crap you're absolutely right I totally forgot about that possibility. Then 225/40/18 (25" OD) or 235/40/17 (24.3" OD) or 225/45/17 (24.8" OD). Don't like the last option, probably too fatty sidewalls relative to width and first option is probably too tall to fit easily without rubbing (plus I need new rims which are discontinued if I recall). I'll put that aside and come back on tires only if front wheels lock up too often.
Now that's interesting!