Checking your tyres… what.. why.. when.. and how…??

WHAT…

So.. How many of you actually know what you’re looking for when you check your tyres? I’ll be the first to admit that before I started working at Merityre I had no idea that the tread on your tyre could wear unevenly, or that you could actually repair a puncture rather than having to buy a brand new tyre. Well in this entry I will try to explain exactly what to look for when you check your tyres.

WHY…

It should go without saying that your tyres are a fundamental part of your vehicle as they are the only parts which have contact with the road (hopefully)!! It is therefore incredibly important that your tyres are in a safe and working condition when driving yourself/friends/family or anyone else around. You never know how many times your tyres may have saved you and your vehicle from serious accidents or damage already.

Did you know that WORN TYRES:

·         Are unsafe

·         Do not give you the adhesion to stay safe on the road

·         Can be illegal… Penalty points here we come

·         Can burst, leading to serious accidents

·         Increase fuel consumption!

·         Pick up foreign objects more easily which can lead to punctures

·         Can lead to other more serious problems with your car

·         Can increase the possibility of prosecution after an accident and increase insurance premiums.

·         Will give you an uncomfortable ride

WHEN…

So firstly, when should you check your tyres? Well there isn’t really a set amount of time between when you should do checks, but we would recommend every week, and before undertaking any long journeys. This means that if you do have any problems, you will spot them quickly and hopefully avoid driving around on potentially dangerous tyres.

HOW…

The first step is to turn on your engine (with the handbrake on and out of gear), and turn the steering wheel so it locks on one side, then turn the engine off again (this will depend if your vehicle has power steering). This allows you to see the full breadth of the tread on your front tyres which is important as it allows you to notice if there is any uneven wear across the tyre.

(Many modern vehicle tyres are very wide and the innermost edge of these can wear right down while the outside edge can appear faultless. This can also occur on tyres if the steering and suspension alignment is out on the vehicle. It is very important to check the full width of the tread!)

LOOK FOR…

·         Now you check your tread depth. The easiest way to do this is using a tread depth gauge, but if you don’t have one of these you can use the tread wear indicators which are located within the grooves of the treaded part of the tyre. These are small raised blocks about 10mm in length and 2mm in height which are situated all around the tyre (so you should be able to find them). The legal limit for tread depth is 1.6mm and the indicators are raised to 1.6mm to 2mm. Therefore if any part of the tread area is running flush with the indicators, your tyre has worn to its lowest level and needs replacing.

 

·         You need to make sure that you check as much of the circumference of the tyre as possible as sometimes one section of the tread will be fine, and another section will be worn. This may mean that the tyre is distorted. You need to check for any material degradation in the tyre, for example cracking and perishing.  At the same time look for any deep or long cuts and any foreign objects. Your car drives over lots of different surfaces so you may see bits of stones here and there, but any object which does not come out easily may have penetrated the tyre and be causing pressure loss (puncture).

 

·         Now have a look at the side walls of the tyres. The side walls are prone to damage from impacts, chafing against curbs, under inflation and tearing. You will be looking for cuts, abrasions or missing rubber. When a tyre has a puncture or has been run under inflated for a while it can cause pinching between the wheel and the road surface (run flat damage). This can be seen as an abrasion mark running the entire circumference and worn letters and numbers on the side walls. When this occurs your tyre will need replacing.

 

·         Bulges can be detected by running the flat of your hand over the entire surface of your sidewall. A bulge represents serious damage to the structural integrity of the tyre.

 

·         In the outer rim of the wheel you will find the valve. Check this carefully for any deterioration of the material. Ensure caps are fitted. By moving the valve stem from side to side, look for cracking of the rubber around the base.

Repeat all of these processes for each tyre and don’t forget the spare!

So, for a quick recap:

Your tyres need attention if they have:

·         Low tread depth

·         Deterioration of the rubber (cracking or perishing)

·         Uneven tread wear (distortion of tyre)

·         Deep cuts or sections of tread missing

·         Embedded foreign objects

·         Side wall damage and bulges

·         Damaged or worn valves

So.. Now you know why it is so important to check your tyres, and not just the tread depth, but the whole tyre. If you find this all a bit too much, then just bring your car to your local Merityre Branch www.merityre.co.uk/find_a_centre.htm and we’ll do it for you absolutely free. We will also give you advice on when you may need new tyres and give you a Merityre Tyre Check Report on their condition. You can also have a FREE Wheel Alignment check which will show up any problems and help to prevent your tyres from wearing unevenly.

For information about our Club Card Plus, go to our website at www.merityre.co.uk or ask at your local branch.

The next entry will explain how to check tyre pressures.

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Be Forearmed: Car and Car Tyre Checks for Winter

“Now is the winter of our discontent”, said Richard III. In fact, he meant that the time of unhappiness was past. However, if you don’t check your car tyres – and your car – before adverse conditions arrive, you could experience a highly discontented winter.

Anyone accustomed to living in ‘this sceptered isle’ (Shakespeare again) will be more than familiar with what we are liable to encounter. Dealing with anything that puts our cars and their tyres under stress isn’t all that difficult so let’s start with tyres.

Any car tyre, but for those with studs fitted, will not grip on sheet ice. However, well-worn tyres won’t grip too brilliantly in snow, slush or even in wet conditions. So first, check your tread depth. This should be a minimum of 1.6 millimetres of tread in a continuous band around three quarters of the tyre. This is only the legal minimum but a tyre that’s down to the wear indicators won’t cope well in winter. You may consider investing in a set of winter tyres but in any case, replacing tyres for the winter is a valid action.

It should go without saying that your car tyres should be at the correct pressure. Checking this is any easy job that should be repeated regularly throughout the winter. It’s also worth running a hand over your tyres’ carcasses to check for bulges, lumps, cuts or the evidence of misalignment. Remember also that you have a spare tyre that you might need in a hurry. Check first that you can dismount it, particularly if it lives beneath the car. In some instances, it’s so long since the spare tyre has seen the light of day that its fastenings under the car have long since corroded into immobility. It’s better to discover this at your leisure than at the roadside in mid-snowstorm or hurricane.

Many people see what’s under a car’s bonnet as fit and forget items. Wrong! Having enough non-freezing windscreen washer fluid is fairly important but if your car’s coolant, oil and hydraulic fluid levels are low, you could be heading for major difficulties, if not disaster. They’re easy enough to check and your car’s handbook will tell you all about which fluids should be used and where they should go. Bear in mind that a poor battery will almost certainly let you down as the temperature drops.

Apart from letting you see where you’re going on a black winter’s night, your car’s lights also announce your presence and intentions to other road users. Ensure that each and every bulb or LED on the car is fully functional; this includes less frequently used lighting like front and rear foglights. Carry a full set of spare bulbs and make sure you have the tools and know-how to fit them, if necessary. As an adjunct to vision, your car’s windscreen wipers are extremely important. Examine them and if any are ragged, loose or ineffective, replace them. Should you find any of these tasks too daunting, remember that your local garage will be happy to carry out your winter checks for you.

Finally, what to carry on a winter journey. What you take along can be tailored to the conditions you might meet. For example, you might need a torch, reflective waistcoat or jacket and a warning triangle, and some extra screen wash fluid for normal journeys. Whether you need boots, gloves, a shovel and a thermos of tea depends on where you’re headed.

Merityre are a leading UK independent supplier of car tyres. Why not visit their website at www.merityre.co.uk and see where you can buy your next set of tyres.

State of Readiness: Are Winter Car Tyres Worth Having?

Great Britain has a temperate climate. That no one seems to have told the climate about this is by the by: the sort of conditions we experience every year are officially classified as being ‘temperate’. Yet facts are facts and like all of us, our car tyres have to cope with markedly different climatic conditions. In high summer, the mercury can hit the 30-degree mark, in midwinter, it can fall well below zero. Can a single set of tyres handle this? Let’s find out.

In winter, accidents increase by a less-than-modest 267 per cent. This begs the question of what is a winter tyre? More appropriately, what is it about winter tyres that make a difference? Car tyres conform to a given set of physical characteristics – they must, to be safe, legal and functional. However certain elements among these characteristics can be ‘tweaked’ and it is these differences that make a winter tyre.

The first tweak is to the tyre’s compound, the mix of rubber used in its construction. Water freezes when the ambient temperature is low. Car tyres don’t freeze but they harden, especially when the temperature falls to under seven degrees Centigrade. Winter tyres have a softer compound through containing more natural rubber than conventional tyres and this improves their grip in cold conditions. This specifically softer tread element gives a significant reduction in stopping distance. It also has a knock-on effect in performance terms. Because winter tyres offer superior grip, your car’s cornering, acceleration and braking benefit, as does your confidence.

The next point contains a paradox. After all, isn’t it true that car tyres with a softer compound will wear faster? In a word, no. In fact, conventional tyres have a particularly hard time in winter, pun intended. In practice, they wear out up to 20 per cent faster in cold conditions, so winter tyres can save you money. Some suggest that winter tyres’ enhanced grip means that your car’s engine has less work to do than with conventional tyres, so that fuel economy is also enhanced. This may be a moot point but a Finnish tyre maker says of its winter product, ‘Lower fuel consumption by lower rolling resistance, shorter braking distance on wet road, stronger aquaplaning protection and better snow grip are its benefits.’

The final point concerns noise. Winter tyres have a more open tread pattern, the better to clear away mud, snow and ice. This might suggest they give increased road noise when in use. However, most manufacturers claim that their winter tyres are as quiet and comfortable as normal tyres. This makes sense, as the tread compound is significantly softer.

So, are winter tyres a worthwhile investment? The above suggests that they are. Ideally, it would be best to have two sets of tyres, one set for summer use and one set for when the climate forgets to be ‘temperate’. The bottom line is still more telling. Given the use of grit and salt on the roads during a UK winter, it would make a lot of sense to acquire not only a set of winter tyres but also a set of ‘winter wheels’!

Merityre are a leading UK independent supplier of car tyres. Why not visit their website at www.merityre.co.uk and see where you can buy your next set of tyres.