The tires that come with your hybrid are designed to giving you the best fuel economy.
I found out the hard way. When the original tires provided with the Prius, Goodyear Integrity, wore out, I changed to Michelin Harmony.
The first thing I noticed was a drop in fuel economy [about 5 mpg Cdn in city driving]. The tires seemed to wear a lot slower than the Goodyears, but the loss of the fuel economy and the premium of $20.00 per/ tire does not make good "cents".
In the future, I’ll just be put on the manufacturer’s original tire selection when it comes time to replace them.
Andrew Grant is the world’s first hybrid taxi driver. He introduced his Prius taxi to the not-so-mean streets of Vancouver in 2000, and logged 200,000 miles in just 25 months. Andrew’s Prius was snatched by Toyota. The automaker wanted a chance to study the durability of the hybrid batteries and other components, which held up amazingly well. See this video for details. He’s now driving his third Prius. Andrew has taken a break from taxi-driving, and now works as a professional coach helping his clients achieve personal excellence in various fields of endeavor.