Just purchased New BMW X4, it has 20” Run Flat tyres, aware run flats and tyre size contribute more road noise
But I have this humming sound on normal Uk roads in the cabin, on smooth patch of road it’s fine, so it’s tyre orientated, the tyres are Bridgestones, tried BMW X3 same size tyres Pirelli , and same hum in cabin
Dealer says it’s tyre, and nothing they can do, can I reject it on the 30-day cancellation
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