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Old 01-01-2012, 08:52 PM   #44 (permalink)
mans
EcoModding Lurker
 
Join Date: Dec 2011
Location: usa
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"metrompg" has made rolling resistance tests with various types of tires by rolling down a small hill and seeing how far the car would coast. he repeated this with 5-6 types of tires including a set of spare tire doughnuts.

the doughnuts tested the worst. even worse then old junk tires.
here's the link http://ecomodder.com/forum/showthrea...eet-19126.html

HOWEVER here we have a young man who performed a mpg test on his metro, then replaced the rear wheels with spare tire doughnuts and repeated the test.

he gained 5 mpg with the doughnuts on his rear wheels. that would show that doughnuts are pretty good, way better than stock tires!

whats up with that?
thats a total conflict of results.

can anyone explain how this can be?
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