TOYOTA 2011 Prius - Manual (Page 480)

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4-3. Do-it-yourself maintenance
4
Mai
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tenan
ce and care
PRIUS_U (OM47685U) DVD
n Tire life
Any tire over 6 years old must be checked by a qualified technician even if
they have seldom or never been used or damage is not obvious.
n If the tread wears down below 0.16 in. (4 mm) on snow tires
The effectiveness of snow tires is lost.
n Low profile tires (vehicles with 17-inch tires)
Generally, low profile tires will wear more rapidly and tire grip performance
will be reduced on snowy and/or icy roads when compared to standard tires.
Be sure to use snow tires or tire chains on snowy and/or icy roads and drive
carefully at a speed appropriate for road and weather conditions.
n Maximum load of tire
Check that the maximum load of the replacement tire is greater than 1/2
of the Gross Axle Weight Ratings (GAWR) of either the front axle or the
rear axle, whichever is greater.
For the GAWR, see the Certification
Label. For the maximum load of the
tire, see the load limit at maximum cold
tire inflation pressure mentioned on the
sidewall of the tire.(
→P. 581)