Nokian Tyres reports that the group’s net sales increased by 41.4 per cent to 628.0 million euros during the first six month of 2011 (444.2 million euros in the first half of 2010). Operating profit grew faster still, almost doubling to 165.6 million euros (2010: 82.0 million euros) and earnings per share increased to 1.06 euros (2010: 0.58 euros).