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Maybe not 700 1990

posted by  NJC on  Thu Sep 1 17:01 CST 2005
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last visit: Sun Jul 24 13:42 CST 2011
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Volvodad said:

I've messed with tire pressures from time to time and car to car, and found no detectable difference in fuel economy at any pressure between the minimum recommended by the car mfr. and the max on the tires.

He has empirical evidence - this is worth something.

The contact area of the road is very small. Increasing the pressure from 35psi to 40psi may not flatten the area contacting the road and reduce friction; IE at 35 it might be at the best pressure for optimal rolling resistance. I pick those numbers as arbitrary.

This will depend on tires, how the car is loaded etc.
--
Norm Cook; Vancouver BC; 1989 745T 208,000KM






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New gas mileage increase? [700][1990]
posted by  wreckingcru  on Thu Sep 1 05:36 CST 2005 >


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