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What confuses me is that the BMW tyre (bridgestone ecopia EP500) gets a fuel economy rating of only "B" (eu tyre labelling) which i was surprised about given how skinny it is..
Tyres i have on my honda are way wider (225/40 18) and are rated better for fuel economy - they are "A"; pirelli p7 blue.
How is the pirelli better than the skinny super-eco bmw bridgestone? Or am i missing something?
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