why do u think it will look silly? Ive tried to find photos of 09 optimas but cant find any. If any of you have 18s please post them. Id like to add some black wheels to my optima. I found one pic and it looked really nice.18" wheels shouldn't be a problem as long as you get the correct aspect ratio tire.
18s and 20s just don't look right, IMO. The requisite low-profile tyres look like thin strips of rubber applied around the rims. They don't do a very good job of insulating the car from road shocks, and there are consistent reports of poorer handling and rougher ride.I have a set of 18" Konigs on my 6.5 optima and they look terrific. 20" would fit just fine as well. Don't know why anyone would say that they would look silly when 18" rims are a standard option for certain Kia's.