What size are my tyres?

On the sidewall of a tyre you will find some markings. The list below will help you to understand that information. Some cars have different sizes front to rear so read and let me know both ! Check to see if it is a “RUN FLAT” tyre too!

Take a picture and send it via WHATS APP is best

HOW TO READ A TYRE

Look on the side of your tyre. You will find something like 205/55R 16 91 V . The numbers will vary according to your particular size.

205 This is the tyre width in millimeters.

55 The aspect ratio as a % (the height of the sidewall divided by the tyre’s width).

R Denotes the tyre’s construction type – in this case it’s a radial.

16 This is the rim diameter in inches.

91 This is the load rating of the tyre.

V This is the speed rating of the tyre.

Tyres often need to be changed due to deterioration by the sun after a few years here on the Costa. You may find that your tyres have deteriorated before they have worn out. The tread and sidewalls will start to show signs of cracking and crazing. This deterioration will fail the Spanish ITV and cause an unexplained blowout. Tyres need also to be the same across an axle for the ITV too.

Other Markings

Run flats – This will be written on the sidewall. Varies from diferent manufacturers. RFT, DSST or even RUN FLAT ! We can get and fit most makes except MICHELIN PAX SYSTEM

M&S – Identifies Mud and Snow tyres.

DOT Codes – The requirements of the US Department of Transportation contain a mixture of letters and numbers such as DOT DVDE MTA 129.

E-Marks – Tyres sold in the European Community must carry an E -Mark in accordance with ECE Reg 30 – E.g. E4 027550.

IF YOU ARE STILL UNSURE WE CAN COME TO YOU TO READ AND ORDER THE TYRES. THIS IS ON THE UNDERSTANDING THAT YOU WILL PAY A DEPOSIT FOR THE ORDER SUBJECT TO AN AGREEMENT ON THE PRICE.

ASPECT RATIO

The Aspect ratio is the ratio of a tyre’s width to it’s height. So a 55 series tyre is a tyre whose height is equal to 55% of its width.

LOAD INDEX

Load Index KG Load Index KG Load Index KG
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
290
300
307
315
325
335
345
355
365
375
387
400
412
425
237
450
462
475
487
500
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
515
530
545
560
580
600
615
630
650
670
690
710
730
750
775
800
825
850
875
900
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
925
950
975
1000
1030
1060
1090
1120
1150
1180
1215
1250
1285
1320
1360

The load-index figure is imprinted on the sidewall of the tyre, normally just before the speed rating letter, and denotes the maximum load capacity of a tyre when driven at maximum speed. A list of load indices and maximum weights is give above.

SPEED RATINGS

All tyres carry a speed symbol in the form of a letter indicating the maximum speed for which the tyre is intended. The table below shows which speed goes with each letter.
Speed symbol Max speed km/h mph
N
P
Q
R
S
T
H
V
W
Y
ZR
140
150
160
170
180
190
210
240
270
300
240
87
93
99
106
112
118
130
149
168
186
149

UP STEPPING

Up Stepping to High Performance
Maximizing your car’s performance by selecting a lower profile tyre/larger size rim combination is referred to as “up-stepping.” Plus-one or plus-two tells you how much larger the rim size is. This “up-step” approach to improving performance came into being because, although it is possible to get higher performance without changing rims, it is often necessary to increase tyre width to the point that steering geometry is affected, with the result that a change in driving style or habits becomes necessary.

So in order to fully maximise your vehicle’s performance (which includes preserving the steering geometry) the “up-step” approach is highly recommended

ROTATION

Tyre wear rates differ depending on the axle on which the tyres are fitted and whether the vehicle is front, rear or four wheel drive. To extend the life of your tyres it is advisable to change tyre positions on a regular basis. Different tyre manufacturers may recommend different rotation periods, ranging from 4-10,000Km. It is advisable to switch tyres from left to right periodically as well as from the back to the front of the vehicle.

Certain high performance tyres are position specific and cannot be rotated.

TREAD DEPTH

Current tread depth legislation requires that car tyres must have a minimum of 1.6mm of tread in a continuous band throughout the central ¾ of the tread width and over the whole circumference of the tyre. To help drivers recognise when their tyres are nearing the legal limit, tyres are manufactured with tread wear indicators in the grooves.

The tyre industry recognises that the legal tread depth limit is insufficient to protect drivers in adverse driving conditions. Drivers are therefore recommended to consider replacing their tyres when the tread depth reaches 3mm.