I am thinking about getting some 17" alloys for my car which is a Astra sxi. I dont want to lower cause i belive that is already standard lowered but i dont want it to look stupid. Can some correct me if i am wrong my alloys on the car are standard Astra SXi which are 15" with 50 profile tyers. If i was to put 17" with a 40 profile there will be no change it would still messure the same across the alloy and tyer and no differents in the ground clearance.

REALLY NEED HELP ON THIS 1