Tires may wear out prematurely on Toyota Prius

Premature tire wear is an concern due to the soft rubber compounds specified for original equipment tires. Our technicians tell us that most owners have changed to better wearing tires but fuel mileage has suffered as a result.

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Average mileage: 103,250 (28,000–210,000)
6 model years affected: 2001, 2002, 2003, 2004, more2007, 2008
8 people reported this problem
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problem details
2004 Toyota Prius 145,000 mi,
Replaced tires 20k miles ago (had gone 30k before previous replacement), and they're already at 4/32" tread depth. Using Integrity tires, may switch off but don't want to see mileage suffer as seems to be the case.
2008 Toyota Prius 28,000 mi,
Tires worn out, had to replace. Cudn't find easily. Cost me $700 for a set from dealer.