I recently bought a BMW 325 with such wheels (50cm diameter) and within a few days I had to get a new tyre, because one had jumped off the rim and become ruined when going over a pothole. I was told this is much more common with big wheels than with standard ones. I also thought the steering was a bit unsteady and was much more conscious of unevenness in the road. So I got a set of standard wheels (secondhand with new tyres) and the improvement in the car’s handling and shock absorption is quite obvious. I am now very pleased with it.