Do Evoline have aluminum rims with 225 tires on it, can you pull 205 tires up?

Hello friends, have Evoline aluminum rims with 225 tires on it, can you pull 205 tires up? How can you recognize which tire size fits which rim? I have a Pontiac Trans Sport U Van and here you can only have 205 tires on it according to the FZGB letter, therefore I want to do this also because otherwise in an accident there is no insurance claims if everything is not as it should be.