Viatti winter tire models with asymmetric non-directional tread pattern (different design and blocks/sipes geometry on the left and the right sides of the tread):
The outside and the inside of these tyre models perform different functions, and their asymmetric tread pattern allows for solutions that enhance tyre performance, such as stability, handling, dynamic properties and braking. At the design stage, all solutions on tread pattern asymmetry are calculated many times by means of specially configured software to obtain the perfect contact patch and equal contact pressure distribution. Aquaplaning resistance, tread self-cleaning ability and other essential winter tyre characteristics are also determined by calculation. All prototypes are subject to mandatory proving-ground tests involving the evaluation of handling, braking distance, noise and other characteristics. They are also tested for safe ice and snow driving. The prototype tyres can be validated for serial production only upon successful test results.
The product mix offered by the majority of leading global tyre companies also includes a wide variety of asymmetric non-directional models of summer and winter tyres.
The grip coefficient of these tyres is the same for different roads; therefore, information occasionally posted on the Internet concerning vehicle drift, due to the grip difference between left and right tyres, is unfounded, since such drift mostly depends on a tyre construction, and not on the tread pattern. Besides, corner and cone effects (which depend on a tyre construction) have permanently directed force vectors. In case the tyres are mounted on a vehicle properly (observing sidewall inscriptions “Outside” and “Inside”), these force vectors will be multi-directional, thus contributing to driving stability of a vehicle.
Proper mounting of Viatti tyres with asymmetric tread pattern is shown below. Observation of sidewall inscriptions (“outside” and “inside”) ensures safe and comfortable tyre operation.