NA-1 adopts uniquely asymmetric pattern design. The inside pattern stresses on drainage performance. Larger void ratio improves drainage performance on wet roads. The enlarged third section of tread radius lessen contact pressure of tread shoulder, and further reduce the noise generated from the lateral grooves on tread shoulder.
Light-weight profile and narrow tread width design reduce rolling resistance. The outside pattern emphasizes on manoeuvrability. The larger pattern blocks on tread shoulder offers better cornering handling. Noise prevention bar on the lateral grooves of outside tread shoulder block airflow in the grooves to reduce the derived noise. Chamfered groove wall design scarifies the water film for getting a better wet grip.
EU Tyre Label and Efficiency Classes
The European Union, under CE 1222/2009, has mandated that all tyres manufactured after the date of July 1 2012 for cars and commercial vehicles include standard EU Tyre Labels classifying them by three performance characteristics:fuel efficiency classified from A to G,wet grip classified from A to G, and noise emission in decibels.
Categories of tyres unaffected by this regulation include: retreaded tyres, professional off-road tyres, racing/sports car tyres, as well as certain types of tyres designed to improve traction such as studded tyres, T-type temporary spare tyres, tyres for cars built before 1990, tyres with a maximum allowed speed of 80km/h, tyres for rims with a diameter less or equal to 254 mm or greater or equal to 635 mm. This label is intended on one hand to promote economic and ecological efficiency in traffic, as well as increase road safety, and on the other hand to help consumers select appropriate tyres by ensuring a certain degree of product transparency.
Nevertheless, the label has been criticized for only showing a very limited number of characteristics. Professionals argue that tyres have many more features that are important and relevant to road safety, including but not limited to aquaplaning properties, driving stability, service life, product properties on wet and dry roads other than wet grip, properties on snow. Tyre manufacturers suggest that the test results from various institutions and industry magazines should remain a very important source of information for the end consumer, because they focus on and rate a wide variety of tyre properties and features.
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What tyre size do you require? The exact size of a tyre can be found on its sidewall. The following chart shows you how to read a tyre size.
1. The width in mm 2. The height as the ratio between the width and the height in % 3. Construction type: "R"= radial (often seen), "D" or "-"= diagonal (rarely seen) 4. The required rim diameter (in inches) for this tyre 5. Load index 6. Speed index
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