New user here from the US. I've found a set of 18x8.5" rims with a 40mm offset that I would really like to put on my Astra. I did a search on this forum and found one person saying an 8.5" rim w/ 30-35mm offset is the max you can fit on the car. In another thread someone said they were running 8.5" wheels with 45mm offset. I was hoping someone on here might be able to confirm which is the largest size wheel that can fit on the car w/o any modifications to the car body. If it makes a difference, I plan on using the eibach pro kit to lower my car. Thanks for your help!