ASK THE EXPERTS

I have for many years been mystified by the practice of giving the size of a vehicle's wheels in inches, while the remainder of a vehicle's vital statistics ��� power, torque, dimensions, consumption, CO2 emissions etc, are correctly given in metric. It's ridiculous that after so many years of decimalisation and metrification that publications persist with this. Do you have any explanation of why that situation should be allowed to persist in the motor trade and its press? Toby Hagon, in his road test of the Mercedes-Benz CL63, writes in the same sentence of "massive 20-inch wheels ��� and tyres as wide as 275 millimetres at the rear". How crazy is that?

Hot laps with motor sport heavyweights

Stephen Ottley is a white-knuckled passenger in a fast and furious race concept.