Tyre Information

Tyre Information

Tyre Information

Some Useful Information Regarding Your Tyres

Tread Depth 
The law states that there should be a minimum tread depth of 1.6 mm across the central ¾ of the tread and all the way around the circumference, the remaining ¼ should have visible tread lines.
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Tyre Pressures
Your tyre pressures should be set according to the manufacture recommended settings, which changes for driving speeds, vehicle load weight and tyre size. This can be found either on a label within the car or in the handbook. Ask if not sure and we can help. We recommend to check the pressures once a week. Your tyre pressures should be checked at regular intervals or if you are making a long journey this should be done when your tyres are cold, as when the tyres are warm the air inside them expands and you will get a false reading. 

If your tyre pressure is not correct the following can happen:

Too Low - if your tyre pressures are too low it can wear the outsides of the tyre quicker than the centre.
Too High – if your tyre pressure is too high it can wear the centre quicker than the outside.
By ensuring your tyre pressure is correct you can elongate the tyre's life by allowing it to wear evenly, reduce your fuel consumption and reduce the amount of greenhouse gases produced by you vehicle.

How To Find Your Tyres Specification

tyres Specification
The details on the side of tyres can give you a lot of information. Every tyre side wall shows information about the manufacturer, size, model etc. Here's a summary of the most important information and what it means. See image for explanation.

Example: 205 40 R17 84W
  • 205 - means the tyre has a nominal section width of 205 millimetres.
  • 40 - is referred to as the aspect ratio and is the height of the tyre side wall as a percentage of the nominal section width.
  • R - means the tyre has a radial construction, the most commonly used of three different types of tyre construction: cross ply, radial and bias belted.
  • 17 - means it fits a 17" diameter wheel.
  • 84 - is the load index. This identifies the maximum load capacity of a tyre when driven at maximum speed.
  • W - is the speed rating. This represents the maximum speed that a tyre can sustain at full load. The example shown is rated for speeds up to 168mph.
  • Other common speed ratings are:
Q - for cars with maximum speeds up to 100 mph (160 km/h)
R - for cars with maximum speeds up to 105 mph (170 km/h)
S - for cars with maximum speeds up to 113 mph (180 km/h)
T - for cars with maximum speeds up to 118 mph (190 km/h)
H - for cars with maximum speeds up to 130 mph (210 km/h)
V - for cars with maximum speeds up to 150 mph (240 km/h)
Z - for cars with speeds over 150 mph (240 km/h) 
W - for cars with maximum speeds up to 168 mph (270 km/h)
Y - for cars with maximum speeds up to 186 mph (300 km/h) 
Premier Tyres Ltd, YOUR number 1 for tyre sales and fitting service in Stafford, Staffordshire. Give us a call for a free quote or to ask a question
01785 222272
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