Since buying a nearly-new Fiesta Econetic a month or so ago, I'm worried that the suspension maybe too low.
I live in London and when I go over some road-humps (even with great care) there is a sickening "crunch" sound from below. I am wondering - has anyone else had this? My local garage suggests replacing the wheels for slightly larger ones.
If I did that, I'm anxious that it may be regarded as a "modification" by my insuraqnce co. Could this be a design fault?
Does Ford's R+D team have a test track with humps like in London, I wonder? All sugestions gratefully received.

Best,

Nick