About Winter Tyres 205 55 16
Winter tyres are designed to offer more grip and stability than a standard tyre in wet, snowy and icy conditions. The tread is configured differently and in some cases the composition of the materials used to manufacture the tyre will be slightly different. In several European countries it is mandatory to have winter tyres fitted to your car during the winter months. This is not the case in the UK, but it is advised that you fit winter tyres for increased safety, especially when travelling in areas that experience more extreme wintry conditions.
When fitting winter tyres it is critical that you get the correct size and type of tyre. The numerical code 205 55 16 will confirm this and will be written on the tyre itself making it easy to recognise. The 205 refers to the width of the tyre in millimetres. This will be the area that is in contact with the road most of the time. The 55 refers to the aspect or profile of the tyre and is calculated as the ratio of height to width. At 55 this is a mid aspect tyre and will have good tread depth. The 16 is the rim diameter of the tyre in inches. The rim diameter determines what size of wheel the tyre will fit on to, so be sure to check your requirements.
The tread on a winter tyre is designed to expel water, snow and mud from the tyre to give greater traction and stability on the road. It achieves this through the positioning of specially constructed grooves along the surface of the tyre. This is particularly relevant if aquaplaning occurs or in snow and ice where a build up of either can result in little to no grip.