no, most 225/60R18's are only rated for a 6-8" rim width. tire manufacturers usually give a range of rim widths their tire sizes will fit. many shops won't put a tire on a rim outside the manufacturer's recommendations....
you've kinda screwed yourself with the 10" rims....they're really too wide for 255/55R18's, which is the size I'd recommend (most are rated for 7.5-9" rims). you could go to a 275/45....they'll be slightly short (27.7" tall), but bigger issue is that size is limited in availability and very expensive. cheapest one on tire rack is $204 ea.
the 275/35R18's are less than 26" tall and will look very out of place on the car.....
you've kinda screwed yourself with the 10" rims....they're really too wide for 255/55R18's, which is the size I'd recommend (most are rated for 7.5-9" rims). you could go to a 275/45....they'll be slightly short (27.7" tall), but bigger issue is that size is limited in availability and very expensive. cheapest one on tire rack is $204 ea.
the 275/35R18's are less than 26" tall and will look very out of place on the car.....