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The air runs out of run-flat tires

After settling a lawsuit last month with disgruntled owners of Michelin run-flat tires, Honda dropped the tires for the 2010 model year. It was another disappointment for Michelin and other makers of run-flat tires in a 17-year effort to win customers in the United States. When run-flat tires appeared here in 1992, they were expected to win wide acceptance as original equipment.

New Audi RS4 Avant costs £54,925

Audi has revealed that the new RS4 Avant complete with 444bhp from its 4.2 litre V8 – will cost £54,925 in the UK. The new Audi RS4 Avant got its reveal at this year’s Geneva Motor Show and is the only RS4 body style you’re going to get. Unless you count the RS4 in coupe guise that Audi call the RS5.

Video: GM's Frank Saucedo, Niki Smart and Gael Buzyn on the Elmiraj concept

GM director advanced design Frank Saucedo features in a new video explaining the design process behind the new Elmiraj concept. Saucedo, who oversaw the concept's development at GM's advanced design studio in North Hollywood, California, talks about how the Elmiraj – the second in a series of three concept cars that began with last's year Ciel – is a study of how they can progress and evolve the carmaker's ‘Art and Science' design philosophy. GM's interior design manager Gael Buzyn and exterior design manager Niki Smart also feature, with Smart explaining how the Elmiraj concept is focused on the notion of ‘the drive' and has been designed to reflect dynamism while the Ciel was about ‘the journey', represented by a luxurious interior.