PART WORN TYRES
PART WORN TYRE ECONOMICS
Many drivers who buy part worn tyres do so because they believe they offer better value for money. However, this isn’t necessarily the case. Rather than just considering the initial purchase price, drivers should look at the cost per mm of useable tyre.
New tyres are normally sold with 8mm of tread depth whereas part worn tyres may have as little as 2mm of tread. With a legal minimum tread depth of 1.6mm in the UK, the cost per mm of useable tread of part worn tyres can be considerably more than that of a new tyre. Equally, a part worn tyre will need to be replaced again much sooner than a new tyre meaning further expenditure will be required.
PART WORN TYRE SAFETY
Adequate tread depth is essential for safe driving on wet roads. The tread grooves help to remove water from the contact patch between the tyre and the road surface, which is essential for effective acceleration, cornering and braking.
A tyre with lower tread depth levels is less effective at removing water from the road, leading to longer stopping distances and reduced road safety. Indeed, according to tests conducted by the British Tyre Manufacturers’ Association, braking distance in wet weather of a tyre with only 1.6mm of tread depth is almost 12m longer than a new tyre from 50mph.CAR TYRES
Tyres are the only parts of the car which are in contact with the road. Safety in acceleration, braking, steering and cornering all depend on a relatively small area of road contact. It is therefore of paramount importance that tyres should be maintained in good condition at all times and that when the time comes to change them the correct replacements are fitted.
The original tyres for a car are determined by joint consultation between the car and tyre manufacturers and take into account all aspects of operation. It is recommended that changes in tyre size or type should not be undertaken without seeking advice from the car or tyre manufacturers, as the effect on car handling, safety and clearances must be taken into account.
In some other European countries it is illegal to use replacements which differ in certain respects (e.g. size, load, and speed rating) from the tyre fitted originally by the vehicle manufacturer.