You should not simply downsize to lower profile tires without changing rim size because the overall outer diameter will be reduced too much and hence your ride height drop and fender gaps will increase by the same.

For example if you just use 225/55/17, then your sidewall height will drop by 2.3cm so the ride height will also drop by the same and you will have extra 2.3cm gap between the tires and fenders, making it look ugly. So if you want to use 225/55 tires then you need to upsize the rims to 19' to compensate for the loss of 2.3cm height so the overall outer diameter will be about the same (just a few mm difference), so the tire size should be 225/55/19. Doing such conversion though will be very costly coz bigger diameter tires and rims, especially when reaching 19' is a huge jump in prices.

This post has been edited by 6UE5T: Feb 10 2019, 09:20 PM