Nitrogen Filled Tyres, Tyre Shop Chard, Somerset
|      Home      |      Services      |      Nitrogen Tyre Inflation      |      Tyre Info       |      Links      |      Contact      |

Tyre Info ...

PSI & Bar Conversion

KPa Bar Lb/in2(psi)
150 1.5 22.0
160 1.6 23.0
170 1.7 24.5
180 1.8 26.0
190 1.9 27.5
200 2.0 29.0
210 2.1 30.5
220 2.2 32.0
 
KPa Bar Lb/in2(psi)
230 2.3 33.5
240 2.4 35.0
250 2.5 36.5
260 2.6 38.0
270 2.7 39.5
280 2.8 41.0
290 2.9 42.5
300 3.0 44.0

Tyre Speed Marking

Speed Symbol Maximum car speed for which tyre is suitable
km/h  mph 
 L 120  75 
 M 130  81 
 N 140  87 
 P 150  93 
 Q 160  100 
 R 170  106 
 S 180  113 
 T 190  118 
 U 200  124 
 H 210  130 
 V 240  150 
 W 270  168 
 Y 300  186 
 ZR over 240  over 150 
 
Tyres for speeds over 240 km/h may be marked for interim period with both 'ZR' and the relevent service description (e.g. 195/50ZR15) to specify the tyre performance. In the absence of a service description, consult the tyre manufacturer for actual maximum speed and the relevant load capacity.
Tyres with a marking 'ZR' (e.g. 195/50ZR15) are for speeds over 240 km/h.

Tyre Load Indices and Related Maximum Loads

Load Index Load Kg
60 250
61 257
62 265
63 272
64 280
65 290
66 300
67 307
68 315
69 325
70 335
 
Load Index Load Kg
71 345
72 355
73 365
74 375
75 387
76 400
77 412
78 425
79 437
80 450
81 462
 
Load Index Load Kg
82 475
83 487
84 500
85 515
86 530
87 545
88 560
89 580
90 600
91 615
92 630
 
Load Index Load Kg
93 650
94 670
95 690
96 710
97 730
98 750
99 775
100 800
101 825
102 850
103 875
 
Load Index Load Kg
104 900
105 925
106 950
107 975
108 1000
109 1030
110 1060
111 1090
112 1120
113 1150
114 1180
 
Load Index Load Kg
115 1215
116 1250
117 1285
118 1320
119 1360
120 1400
121 1450
122 1500
123 1550
124 1600
125 1650

Tyres Branded or Budget
When it comes to choosing tyres customers are faced with a vast range of brands to choose from. As well as the well known manufacturers like Michelin, Pirelli, Goodyear, Bridgestone, & Continental etc there are a number of less known mid range brands, numerous second-line brands owned by the major manufacturers, private brands and literally dozens of budget brands coming from all over the world. That being the case, it’s not surprising to find that the price of tyres varies hugely.

The top brand manufacturers invest heavily in research & development often working in conjunction with the car manufacturers. This ensures that their products are the most advanced in the market place, however the lesser known manufacturers usually catch up sometime later. Given the sometimes large difference in the price of some budget tyres & the fact that the manufacturers are relatively unknown, the performance of such tyres has to be questionable.

The car driver should always remember that although his vehicle may be fitted with all the latest electronic braking & traction aids, the only connection between car & road is the tyres. Therefore it makes sense to buy tyres of known pedigree & quality & renew them before they reach the minimum tread depth.

Tyre Law
UK law requires that your vehicle is fitted with the correct type and size of tyre for the vehicle type you are driving and for the purpose it is being used. This means fitting the right tyres and for safety ensuring that they are inflated to the manufacturer's recommended pressure.
The legal limit for minimum depth of the tread on your tyres is 1.6 millimetres, across the central ¾ of the tread around the complete circumference of the tyre.

For safety reasons it is recommended that you replace your tyres before the legal limit is reached. Many vehicle manufacturers recommend replacing at 3 millimetres. To see the impact on braking distance of different tyre tread depths see the diagram below. At 1.6 millimetres in wet weather it takes an extra car length (8 metres) to stop at 50 mph than if your tread was 3 millimetres.

Tyre Tread Information
Tyre Breaking Distance Diagram

Tyre Pressures

Tyres perform best when inflated to the correct pressure. Many drivers neglect to check their tyre pressures regularly. This will result in increased tyre wear & fuel consumption, as well as reduced grip especially when braking & cornering, and on wet roads. Under inflated tyres also run much hotter due to increased flexing of the sidewalls.

Tyre Pressure Diagram
CHECK YOUR TYRE PRESSURES REGULARLY


Checking Tyre Pressure
Breadth of Tyre Diagram


Tyre Industry Council Welcomes Tread Depth Research
The Tyre Industry Council has welcomed the results of independent tests carried out at the Motor Industry Research Association (MIRA), which confirm the importance of adequate tread depth on vehicle tyres. The independent braking tests conducted by MIRA into stopping distances and the cornering performance of car tyres on wet road surfaces show conclusively that these deteriorate noticeably well before the end of a tyre's life. As an example, braking tests showed that significant increases in stopping distance begin to appear when tread depth falls below 3.5mm. Compared with the reference tyres used in the MIRA test, which had 6.7mm of tread, stopping distances were approximately 16% higher on similar tyres with 3mm of remaining tread and over 60% higher on those with only 1mm. In welcoming the results of the tests the TIC stressed how important it is that motorists check the tread depth on their tyres regularly as well as pay attention to other safety critical features of their tyres such as pressures and wheel alignment.
Wet Road Breaking Distance


Tyre Diagram


Tyre Markings
Tyre Fitters Chard Somerset
© 2009 - 2015 TYE TYRES - Nitrogen Filled Tyre Technology - Chard Business Park - Chard - Somerset   |   Great Value Tyres in Chard   | A Web Design UK Website
Tyre Shop Chard