Hybrid Asian Dragon highway noise?

Hybrid in just over 40 engine intervention for a little while, the sound is obvious point, and then up to 50 to 80 this section is not very big, up to 100 above the road noise is quite big, the original tires almost, it is recommended to drive a year or two to change the Michelin, mute effect is good. My top of the line, the front double-glazed may sound a little smaller, the overall noise is not big, high speed is mainly wheel

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