Volvo rims press-in depth

Hello dear volvo friends. I bought again a volvo after 2 years Audi driving and would need an info. I have a v70 bj 10.2009 and would need still summer tires+lu rims. I found myself at the rimsoutlet great rims Can I mount without complication and without any change on the body a rim with 8j 18 et 45 with the original tire 245/40/18 Or is it better to drive at all only 17 inch rims Given is always et 55 of volvo .. I don’t want to disperse iterungen or change anything on the car. Thanks already in advance Alex