I've got 215/45/18 on OEM rims 18 x 7, how well does 225/40/18 perform on these rims? I've read on other Mazda forums and the carbible that they shouldn't be fitted to 18x7 rims. What's been other 6 owners experience with this size tyres, do they look too small for the wheel arch and how about comfort or performance? Any feedback would be great. Thanks.