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P = Passenger Tyre (LT = Light Truck)
225 = Overall width of the tyre in millimetres
70 = Sidewall height (distance from rim to tread) as a percentage of the thread width (known as aspect ratio)
R = Tyre construction, this one is Radial (also, B = Belted Bias, D = Diagonal Bias
15" = Represents the size of the wheel in inches
Check Air Pressure in all tyres regularly
Ensure you have the correct tyre for your car
Avoid Mixing Tyres
It is preferable that this check is conducted weekly, when tyres are cold, and a guage known to be accurate. Drop into any Ovation preferred dealer for a free Air pressure check and assesment.
You can confirm this by confirming with the tyre placard to your vehicle which indicates the correct size, speed rating, load carrying capacity, as well as recommended inflation pressures. The placard is located to all vehicle since 1973 and is usually contained in the globe box, on the drivers door pillar or under the front bonnet
Radial ply abd diagonal ply tyres have different characterisitics and it can be dangerous to 'mix' them on your vehicle. It can also be dangerous to mix tyres sizes or aspect ratios. You should consult your local Ovation Tyre Dealer for specific advice.
Many impact fractures occur in the sidewall area of the tyre rather than the tread. Careful parking will reduce damage to tyre sidewalls that can occur through contact with curbs.
Ensure that tyres have more than 1.6mm of tread
Most new tyres have about 8-9mm of tread pattern when manufactured. When the tread wears down to less than 1.6mm, the tyre may be unsafe to use in wet conditions and should be replaced as soon as possible. Tyres have indicators in their tread pattern which show as lines accross the tread when reduced to below 1.6mm.
Use care when parking to avoid Tyre Damage
Have your Tyre fitted by a specialist
Tyres should be fitted by a specialist like your local Ovation Tyre Dealer who will ensure that they are fitted to your wheel correctly. Poorly fitted tyres can result in vibration, premature failure, poor handling or rapid treadwear.
Do not use sealants to repair punctures
After a puncture tyres should be inspected internally by a professional such as your local Ovation Tyre Dealer to assess what damage has occured, and whether the tyre still complies with minimum safety standards. While sealants may be acceptable as a temporary emergency measure after a puncture has occured, they often do not inflate the tyre and accordingly the vehicle should be driven at reduced speeds until the tyre can be changed or permanently repaired. The use of sealants may invalidate tyre warranty.
Understand Your Tyres
To fully understand the issue you should read the section on tyres in the vehicle hand book and check the letters at the end of the tyre size marking as this will show the speed rating of your tyres.
If you have had a traction problem when driving up to your lodge or apartment at your resort or have had a driving safety issue on mountain roads it will often be because these type of tyres are fitted to your vehicle. Due to their width, rubber compound and tread pattern, high performance summer tyres provide unacceptable grip for low temperature snow driving.
It is also important to note that the recent advancements in electronic driver aids, such as ABS and traction control do not provide more traction. These electronic aids only prevent drivers from over braking or overpowering the available traction of their tyres. The only thing the driver can do to increase traction, to actually get more grip and safer control, is to install snow tyres.
A speed rating is sometimes put in front of the R (or B or D). A straight R rating means that it is rated for speeds of up to 100mph. The manufacturer does not recommend this tyrefor speeds greater than 100 mph. Other speed ratings are: S=112mph, T=118mph, U=124mph, H=130mph, V=149mph, & a Z rated tyre is for speeds in excess of 149mph.
The V and Z rated tyres have excellent dry pavement grip/traction but due to their soft rubber compounds, do not have a long life
A tread rating indicates how long a tyre should last. This figure is written in small letters on the sidewall of your tyre. The higher the number, the longer the tyre should last. 100 is the basic tread wear rating
The traction rating works just like grading - 'A' being the best, 'B' is good, and 'C' is acceptable. This number is also found on the sidewall.
Temperature ratings work the same - 'A' best, 'B' good, 'C' acceptable. If you drive your car very hard, you want a temperature rating of 'A' because a 'C' would fail faster under these conditions. Again, look for this number on the sidewall.