Good to know. I've been noticing the same thing on my Z. It's garaged at night so not in the morning, but after I get off work at night and drive home. Makes a weird thumping sound that is definitely drive-train related. It goes away quick as it doesn't usually get too cold here in the PNW. Good to know it's the tires. I was planning to mention this to the dealership but I'll stop worrying now.
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Berk HFC & CBE, Stillen G3, UpRev & tune by PSI, GTMat, 3M, Swift, StopTech, H&R 20/25, GT-R,
324 whp & 262 torque
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