When To Replace Your Vehicle’s Tires; Tire Life - Toyota Land Cruiser Prado Owner's Manual

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When to replace your vehicle's tires
Tires should be replaced if:
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You have tire damage such as cuts, splits, cracks deep enough to
expose the fabric, and bulges indicating internal damage
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A tire goes flat repeatedly or cannot be properly repaired due to the size
or location of a cut or other damage
If you are not sure, consult with your Toyota dealer.
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Tire life

Any tire over 6 years old must be checked by a qualified technician even if it
has seldom or never been used or damage is not obvious.
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If the tread on snow tires wears down below 4 mm (0.16 in.)
The effectiveness of the tires as snow tires is lost.
CAUTION
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When inspecting or replacing tires
Observe the following precautions to prevent accidents.
Failure to do so may cause damage to parts of the drive train as well as dan-
gerous handling characteristics, which may lead to an accident resulting in
death or serious injury.
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Do not mix tires of different makes, models or tread patterns.
Also, do not mix tires of remarkably different treadwear.
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Do not use tire sizes other than those recommended by Toyota.
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Do not mix differently constructed tires (radial, bias-belted or bias-ply
tires).
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Do not mix summer, all season and snow tires.
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Do not use tires that have been used on another vehicle.
Do not use tires if you do not know how they were used previously.
4-3. Do-it-yourself maintenance
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