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Replacement tires on Prius

When selecting new tires, try to find out what the RRC (rolling resistance coefficient) is. In my theoretical mpg calculations (in Prius Technical forum), I have been using an RRC of 0.0105, which is the number considered by Green Seal to be a low-rolling-resistance tire. At 60 mph, about 4,200 watts (nearly 30% of the 2004 Prius expended energy) goes into rolling resistance. See the Green Seal Report (March 2003) for details.

PriusPhysics
 
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