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      07-03-2012, 05:48 AM   #21
isis
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Drives: 09 X5 3d
Join Date: Jul 2012
Location: NZ

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Quote:
Originally Posted by watrob View Post
For every 6psi decrease in tyre pressure results in a 20% increase in fuel consumption and a 30% increase in tyre wear.

So you are better off running a 41psi in the front and a 39psi in the rears with runflats.
Does this apply to all tyre sizes?
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