Toyota 2008 Prius Quick Reference Manual page 472

5-2. Steps to take in an emergency
CAUTION
When using the spare tire
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Remember that your spare tire is specifically designed for use with
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your vehicle. Do not use your spare tire on another vehicle.
Do not use two spare tires simultaneously.
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Replace the spare tire with a standard tire as soon as possible.
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Avoid sudden acceleration, deceleration and braking, as well as sharp
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cornering.
Speed limit when using the compact spare tire
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Do not drive at speeds in excess of 50 mph (80 km/h) when a compact
spare tire is installed on the vehicle.
The compact spare tire is not designed for driving at high speeds. Failing
to observe this precaution may lead to an accident.
When the spare tire is attached
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The vehicle speed may not be correctly detected, and the following sys-
tems may not operate correctly:
ABS & Brake assist
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Enhanced VSC
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Navigation system
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