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.
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MY22 X5 M-Sport 45e White, 22"rims, Red Calipers, Ceramic Pads. Better off saying what it does not have and that's a B&O Audio System, otherwise all option boxes are ticked.
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