The Fiat Customer Service Network provides information on the choice of tyre best suited to the customer's intended use.
If the tread depth is less than 4 mm, the winter suitability of the tyres decreases significantly. They should therefore be replaced.
For your attention: When using winter tyres with a speed index lower than the maximum speed achievable by the vehicle (increased by 5 %), it is advisable to display a notice inside the vehicle clearly indicating the maximum speed allowed for these tyres (as provided for in the EU Directive).
In the interest of greater safety when driving, braking, safe tracking and steering, the same tyres (make and tread) must be fitted to all four wheels.
The running direction of the tyres should not be changed.
Snow chains
The use of snow chains is subject to the applicable regulations of the individual countries.
The snow chains may only be used on the tyres of the front wheels (drive wheels).
The use of Lineaccessori Fiat snow chains is recommended. The tension of the snow chains should be checked after travelling a few metres.
(Source: Fiat - Ducato operating manual)