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Shocking Truth Revealed – Emissions Analytics Says Choosing B-Rated Radials Over F-Rated Ones Below Motorway Speed Limit is Futile

13 June 2014 503 views 2 Comments

Emissions Analytics has discovered that the ratings on EU tyre labels fall short of providing comprehensive information to motorists. It says that performance of F-rated tyres is equivalent to the B-rated ones at mid-range velocities, in terms of fuel efficiency.

hocking Truth Revealed - Emissions Analytics Says Choosing B-Rated Radials Over F-Rated Ones Below Motorway Speed Limit is Futile

The Effectiveness of Tyre Labels Questioned

Emissions Analytics (EA) is the UK’s leading research and development firm that specialises in providing real-world data on fuel consumption and greenhouse emissions. EA uses tailpipe measurements to arrive at pertinent statistics.

According to the company, EU tyre labels fail to narrate the entire tale about a tyre’s performance. They have found via extensive data analysis that the performance of radials with an F-rating in the fuel efficiency criterion, is similar to those with a B-rating, while travelling at mid-range speeds.

The Tests That Led to Results

The research team at Emissions Analytics carried out on-road tests in which two pairs of 175/70 R14 radials were used. Tyres in one of the two sets were rated with a B for fuel economy, while the remaining ones were rated with an F. The test was carried out under consistent ambient temperatures on a tarmac test route.

The vehicle was run at steady-state speeds ranging from 40mph to 70mph. The test results surprisingly revealed that, on an average, B-rated radials managed merely 3.8% and 3.4% improvement in terms of mpg and CO2 emissions respectively, while driving between 40 and 70mph.

Hence, in mid-range speeds, there isn’t a drastic difference between the two tyres in terms of fuel-related performance, says EA. But at 70mph, the speed limit for UK motorways, the disparity in fuel efficiency between B-rated and F-rated rubber reached 12.9%.

EA’s Final Statement – the Need for More Sophisticated Labelling

On the basis of these findings, EA explains that a consumer purchasing tyres with a B rating for fuel efficiency will not experience significant benefits during regular urban travel. On the other hand, motorists travelling extensively on motorways should feel a notable improvement.

Emissions Analytics explains that the relationship between fuel efficiency and rolling resistance of tyres is far from linear. The company rep further added that it is high time tyre manufacturers adopted more sophisticated calculative models in order to make the general approach of buying and selling radials better.

The research specialist at EA strongly opined that the existing tyre labelling system mandated by EU in November 2012 is not working as expected. EA supports this opinion with the aid of following research data compiled by Lanxess and NTDA. These two eminent tyre industry organisations found 93% of retailers saying that tyre buyers hardly ever requested tyre labelling information. Moreover, only 30% knew that choice of radials impacted their vehicle’s fuel efficiency.

Emissions Analytics concluded that radial manufacturers must develop and execute better models to effectively translate rolling resistance stats into fuel efficiency effects. Consumers would potentially welcome independently verified enhanced testing methods, and improved EU labelling that incorporates monetary calculation of a typical benefit. This is exactly what may provide a tangible benefit that the consumer is subconsciously seeking.

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