Alpine News

HOW SNOW CHAINS GRIP

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In order for wheel chains to work effectivel­y, and to provide the maximum amount of traction and braking, chains must penetrate into a compacted snow on the road surface. Wheel lock up can occur when the snow chains are used on a ‘black road’. This occurs when the icy surface begins to break up or melts and the vehicle can slide on the wheel chains under hard braking. Please refer to the snow chain section of your vehicle owner’s manual for further explanatio­n. Wheel chains fitted to summer tyres on the front wheels will increase traction for take off, for driving and for braking but cannot assist with vehicle’s lateral stability. Because of the inadequate grip of summer tyres on the rear the vehicle it will oversteer and when braking the ABS system can be activated, further increasing the stopping distance. The problems are always worse when driving downhill than uphill. Wheel chains fitted to summer tyres on the rear wheels will increase traction for take off and driving but cannot assist with steering, braking or lateral stability. Because of inadequate grip of summer tyres on the front of the vehicle it will not ‘turn in’ and will understeer. When braking the ABS system can be activated, further increasing the stopping distance. Again, the problems are always worse when driving downhill than uphill.

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