Directional pattern design and lateral grooves from the centre rib to the tyre shoulder improve water drainage when driving on wet roads by moving water at the centre to both sides of the tyre through these lateral grooves. It also features improved traction on ice/snow roads by containing ice and snow in grooves and easier ice/snow removal.
The lateral groove connecting irregular longitudinal groove pattern (from narrow to wide) can reduce noise generated. The wave pattern on the bottom of wider groove improves water drainage and space for ice/snow retention.
Interlaced longitudinal grooves for improved water drainage on wet roads. The wave pattern at the groove bottom adds ice/snow grip and ground friction. The triangular block located on the inner wall of the longitudinal groove improves water drainage and traction on wet roads.
The sawtooth shape lateral grooves of tyre shoulder not only adds initial tyre friction but also extra traction for cornering stability. The grooves on the tyre shoulder improve water drainage and tyre's snow traction performance.
Similar to off-road tyre sidewall design with largely patterned grooves improves extra ice/snow contact patch and shovelling performance as well as traction performance on snow roads.
Adopted 3D SIPE design and offer deep, medium, and shallow sipe at a different location of pattern blocks. The centre rib with deepest sipes for improved ice/snow traction while the sidewall with the shallowest sipes for better rigidity and cornering performance.
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.