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All new vehicles roll off the production line on a brand new set of tyres. But since vehicle manufacturers do not produce their own tyres, they team up with the world’s leading tyre manufacturers and select tyres that are perfectly suited to the vehicle they are being fitted to. Such tyres are known as Original Equipment (OE) and it can take years to develop a tyre to meet the exacting requirements of the vehicle manufacturer.
What is Original Equipment?
Original Equipment refers to any vehicle component that is selected by the vehicle manufacturer to be fitted to the vehicle as standard. The term is not only used in reference to tyres; manufacturers of batteries, exhausts, and other components can also be selected as original equipment by the vehicle manufacturer.
As you can imagine, it is one of the highest accolades for a tyre to be selected as an Original Equipment Manufacturer (OEM) – recommendations for a tyre product don’t come any bigger than this. After all, if the world’s top car manufacturers place their trust in a particular tyre, it means you can too when the time comes to replace those tyres. That’s why tyre producers work closely with car manufacturers, from initial scope and hypothesis, to extensive product testing to ensure the tyre is ideally suited to the vehicle it is being fitted to.
Rigorous Tests
Vehicle manufacturers put tyres through a series of stringent tests to ensure that they conform to the highest possible quality standards. Every element of the tyre’s capabilities is evaluated – including handling, braking, comfort, fuel consumption, safety, and noise levels, to name but a few.
Tyres are also tested in a number of different weather conditions and surfaces. To put this into perspective the EU Tyre Label, which can be found on all new tyres and is an influential factor for many customers when deciding to buy a particular tyre, only tests three criteria (fuel efficiency, wet grip, and external rolling noise). Vehicle manufacturers, on the other hand, carry out over 100 different tests to find the best tyres. In total, it can take up to three years to develop a new tyre for use as Original Equipment.
No Ordinary Tyres
In some cases, particularly when designing high performance vehicles and sports cars, manufacturers have particularly demanding requirements and so OEMs design and optimise tyres specifically for that vehicle model.
Using these tyres ensures the vehicle drives and performs exactly as the manufacturer intended – which is why manufacturers recommend that only OE approved tyres are used when replacing worn tyres. They may look like regular tyres but there is one key difference that will help you to tell if an OE tyre has been specifically designed for your vehicle.
Sidewall Markings
Many of the world’s top car manufacturers including BMW, Mercedes, and Audi have designated marks that are used on the tyre sidewall to indicate that the tyre meets the manufacturer’s standards and has been given OE status. The same letters and symbols are used by all tyre manufacturers to show that the tyre has been specifically designed for that vehicle.
Manufacturer: Audi Marking: R01 or A0
Manufacturer: BMW Marking: Star
Manufacturer: Mercedes Marking: M0
Common Original Equipment Tyre Markings
The table below includes a list of some of the most common homologated tyre markings and the vehicles they are designed for. This list is not exhaustive and there are many more homologation marks in use. A wide range of original equipment tyres are available at Kwik Fit. Look out for the homologation marking shown in the attributes of tyres that are intended for use with a particularly vehicle make or model.
Manufacturer
Symbol
Alfa Romeo
AR, ARR, AZ
Audi
AO
Bentley
B, B1
BMW & Mini
(Star)
BMW Electric & Nio
I
Ford
FO
Jaguar
J
Land Rover
LR, LRO
Mercedes
MO
Mercedes (AMG)
MO1
Mercedes Runflat
MOE
Porsche
N0, N1, N2, N3, N4, N5, N6
Tesla
T0
Toyota
TO, MZ
Volkswagen
(Plus), VO, G
Trust your local Kwik Fit
For all their bells and whistles, modern cars are still kept on the road because of their tyres. So when it comes to your safety, and that of your passengers, trust your local Kwik Fit garage for tyre fitting – with a variety of options to suit your budget.
Driving in heavy rain can be tricky and bring extra risks. Check out our guide for top tips to stay safe and avoid breakdowns if travelling in wet conditions.
Is the UK on the verge of ‘the coldest winter for 50 years?’ Even if El Niño doesn't hit the UK this winter, reduce the risk of a winter breakdown by making sure your car battery is winter-ready.
Your tyre size can be found on the sidewall of your current tyre and is a sequence of numbers and letters. The most common tyre size in the UK is 205/55R16 but there are many variations so it’s important to check your existing tyre first before searching for tyres.
Tip: Take a photo of your existing tyre sidewall to make it easier to identify your tyre size using the guide below.
The first three digits. This displays the width of the tyre in millimetres. A tyre marked 225 will measure 225mm across the tread from sidewall to sidewall.
Aspect Ratio
The fourth and fifth digits of the tyre code that immediately follow the tyre width. The aspect ratio or profile height of the tyre sidewall is expressed as a percentage of the tyre width. So an aspect ratio of 55 for example means that the profile height of the tyre is 55% of its width.
Rim Diameter
The next two digits represent the size of the wheel rim that the tyre can be fitted to. It is also the diameter of the tyre from bead to bead. So a tyre marked 16 will fit on a 16-inch wheel rim.
Speed Rating
The speed rating of a tyre is represented by a letter of the alphabet at the end of the tyre size code and indicates the maximum speed capability of the tyre. Tyres receive a speed rating based on a series of tests which measure the tyres capability to handle a set speed for a prolonged period of time.
Select your tyre speed rating to find out the maximum speed your tyres can maintain.
If you are unsure what speed rating you need, be sure to check your vehicle handbook. Choosing a lower speed rating than that recommended by your vehicle manufacturer could potentially invalidate your insurance.
Load Rating
The load index provides information on the maximum weight capability for the tyre. The load index is a numerical code that can be located just after the tyre size marking and before the speed rating.
Select your load index to find out the maximum load capability for your tyres.
Although not illegal, it is not advisable to have tyres with a lower speed rating or load index than the manufacturer recommended tyre specification for your vehicle, or to have a combination of different tyre construction types. Consult your vehicle handbook to confirm your vehicle’s tyre speed rating and load index as well as any additional requirements.
0800 75 76 77 You can reach our customer care team 6 days a week from 9:00am to 6:00pm on Monday and Thursday, 8:30am to 6:00pm Tuesday, Wednesday and Friday, 8:30am to 5:00pm Saturday, and 10:00am to 4:00pm on Bank Holidays.
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Front Tyre Size
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We endeavour to ensure we are displaying the correct tyres for your vehicle. However, we recommend all customers check the tyre size printed on the side wall of their tyres before proceeding with a tyre purchase as occasionally discrepancies do occur. By selecting the tyre sizes above and clicking 'Continue', you are indicating that you have checked your tyre sizes.
Please select your front and rear tyre size before clicking 'Continue'.
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Please note: There is a slope that the vehicle must be driven up to reach the vehicle ramp at this centre. This may prevent us from being able to work on some high-performance vehicles, Tesla vehicles or vehicles that have been lowered. If your vehicle has low ground clearance, please contact the centre team on 01342 314 111 before booking.
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