How much of a difference does large tyres make to a vehicle’s fuel efficiency? Several independent tests have shown that the difference can be as low as 10% in a controlled environment – where vehicle speed, air conditioning and other systems are kept constant. But for an average highway driver, the difference in fuel efficiency while driving with larger tyres can be as high as 25%. Moreover, the figure can go up even further when driving in heavy city traffic. So, choose the best car tyre and wheel combination by consulting with tyre experts to keep running costs down and prolong engine life