Tyre Fuel Efficiency Markings Fail To Paint Clear Picture
Tyre Labelled Highly Fuel Efficient Might Not Meet Expectations
The fuel economy marking on a tyre label does not “reveal the full story”, Emissions Analytics has claimed. The purpose of a rating is to emphasise that a car's fuel consumption and carbon emissions are influenced by its tyres. A highly efficient tyre is marked “A” whereas a less impressive compound is “G”. There are various steps in between. The buyer can, therefore, pay extra for efficient tyres to minimise the car's impact on the environment and save fuel. Alternatively, he/she could reduce up front expenditure via a less impressive compound. But life is not that simple. Emissions Analytics has claimed that – in certain circumstances – a tyre with a modest efficiency rating performs in line with a higher rated compound. This conclusion is based on tests that evaluated “B” and “F” tyres at various speeds, in consistent temperatures and with the same car/driver. The results suggested the more efficient compound was, in fact, the stronger performer from fifty-five miles per-hour. At seventy miles per-hour it was substantial more efficient. However, there was little to choose between them at slower speeds. This suggests that a motorist that tends to use urban roads might not benefit from the a more efficient compound. However, it is important to note that there are countless tyres with varying characteristics - so such results cannot be viewed in isolation.
Tyre Labelling System Explained
The tyre labelling system came into force on November 1st 2012. The labels look remarkably similar to those found on domestic appliances such as washing machines, tumble dryers and fridge-freezers, etc. This ensures that the format – which is standard throughout Europe – is familiar and simple to interpret. The vast majority of tyres must have a label by law, but there are exceptions. These include certain racing, professional off road, vintage, re-tread, motorbike and studded compounds. Furthermore, a label reveals more than a fuel efficiency rating. Wet braking performance, for example, is categorised from “A” to “G. TyreSafe has claimed that a car with four category “A” tyres travelling at fifty miles stops eighteen metres shorter than if fitted with “G” - so that is something to consider. A label also reveals the tyre's exterior noise rating, e.g. seventy-two decibels. Whether that is high or low is clarified by a series of waves. One black wave suggests the tyre is fairly quiet, two is mid-spec, and three comparatively loud.