Toyota prius Owner's Manual page 443

NOTICE
 Driving on rough roads
Take particular care when driving on roads with loose surfaces or potholes.
These conditions may cause losses in tire inflation pressure, reducing the
cushioning ability of the tires. In addition, driving on rough roads may cause
damage to the tires themselves, as well as the vehicle's wheels and body.
 Low profile tires (vehicles with 17-inch tires)
Low profile tires may cause greater damage than usual to the wheel when
receiving impact from the road surface. Therefore pay attention to the follow-
ing:
 Be sure to use proper tire inflation pressure. If tires are under-inflated, they
may be damaged more severely.
 Avoid pot holes, uneven pavement, curbs and other road hazards. Failure
to do so can lead to severe tire and wheel damage.
 If tire inflation pressure of each tire becomes low while driving
Do not continue driving, or your tires and/or wheels may be ruined.
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4-3. Do-it-yourself maintenance
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