That's sorta why I mentioned the speed change. Its as if after a 1000 miles, enough tire has worn off that the harmonic wobble moved to a different speed range.These tires on the Bronco are 20k mile tires. I've heard that 5k miles in and 1/4 tread already gone. I suspect Ford knew this also 39psi for a c load mt tire has me questioning the choices made.
I may take it in for a look at the balancing or a flat spot before the tire wears any further. Haven't heard of anyone mention this, hence asking dirt mtn since i think it's unique to a car not moving for months, on brand new tires, thru seasonal heat to cold cycle. Could be overthinking it though.
Per Goodyear:
The most common cause of flat spots on tires is when your car is left too long in the same place. When your vehicle is parked and unused, the area of tire touching the ground can become rigid. You will feel a ride disturbance or shimmy during the first few miles of driving after your vehicle has been parked for a few days, weeks, or months. Flat spots damage the tires' functionality and can be dangerous because one or more flat-spotted tires can cause a shimmy or harmonic vibration, which makes it difficult to steer your car.
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