I want to fit the BBS RX on my Astra (4-stud), in 7x16" size and luckily BBS makes them with 4-stud pattern too. So far so good. I ve noticed though that they are only made with a ET35 wheel offset, and the std offset of the oem wheels i now have is ET49 (6x15"). How could this affect the ride or the suspension? Should i go on fitting them?