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-   -   how to test rolling resistance (http://www.peachparts.com/shopforum/off-topic-discussion/307954-how-test-rolling-resistance.html)

sixto 11-06-2011 01:22 PM
how to test rolling resistance
 
With so many eyes on fuel economy, how come they don't publish rolling resistance specs for tires? I assume it can be measured if they talk about it as a design characteristic.

Sixto
87 300D

jplinville 11-06-2011 01:40 PM
Quote:
Originally Posted by sixto (Post 2823445)
With so many eyes on fuel economy, how come they don't publish rolling resistance specs for tires? I assume it can be measured if they talk about it as a design characteristic.

Sixto
87 300D
Too many variables...road temp, road surface, ambient temp, weight of driver, model of vehicle, etc.

Not publishing the findings also removes liability if the findings don't match with real world numbers.

sixto 11-06-2011 01:43 PM
Yes but they have normalized wear ratings. Seems like a reasonable request rather than regulating the use of descriptors like eco and green.

Sixto
87 300D

MS Fowler 11-06-2011 06:22 PM
IIRC, one of the car test mags, years ago, published a graph with each road test. They plotted acceleration and coast from speed curves.


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