TVE TYRES - Nitrogen Filled Tyres - Chard

Tyre Info ...

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
Speed Symbol	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
WØ	270	168
YØ	300	186
ZR§	over 240	over 150

Ø	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 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.

CHECK YOUR TYRE PRESSURES REGULARLY

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.