A designated gum is used in production especially for snow tyres to improve tyre’s flexibility and mobility. There are numerous sipes distributed on tread to increase traction for driving safty. In pratice, this tyre significantly prevents loss of control and shortens braking distance on snowy roads.
Snow tires are usually tires with a different rubber composition from all-weather (all-season) tires. Cold-weather tires include a greater percentage of natural rubber and silica so there is not as much hardening as found in synthetic rubber in cold conditions:they provide better traction at lower temperatures. Snow tires provide more small-tread areas, increasing tractionon snow and, in wet conditions, allowing water to escape from under the tire more easily.
This reduces the risk of hydroplaning. Snow/winter tires start to perform better than summer or all-season tires if temperature falls below 7C (45F), as the rubber compounds in the latter harden resulting to decreasing grip even on dry pavement Interestingly one achieves maximum grip on packed snow if the slippage/wheel spinis 40-50%, i.e. one should turn off the traction control in most modern cars for maximum traction.
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.
Trek M7 tyre review
Average based on 17 test results
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Internal noise level
13.03.2015fromJonathan Worst tyre I've ever had. Despite only being on rear axle of fwd car, it seriously upset the steering. Very noisy (whiny) and took 10% off fuel economy. Did help in snow but awful in wet and dry. It's more like an off road tyre. Very good wear (unfortunately!) as only lost 1.5mm over 16000 km. had to replace them as felt unsafe.