This is a bit of a long post, so for the TL:DR folk (not that I blame you one bit) the summary is that I changed the 18-inch wheels on my YC Excel, to 3rd-party 16-inch wheels with all-season tyres. Result is significant reduction in road noise, better cushioning against our local abysmal roads and thus better bump absorption Right.... For reasons of no interest to anyone else, I need to have winter or all-season tyres available for the car. Various solutions - extra set of wheels (ste