for the last week i have had a minor vibration in the steering, and less so in the brake pedal but definately a hum from the tires that starts at 30mph and continues to 60mph and probably farther but the road noise takes over. braking does not affect this, the car does not pull to one side. Two months ago about 1000 miles ago i purchased four michelin tires that were the same as the oem, this is the third set of tires i have 80K on the car now, the first goodyear eagles didnt last that long. There was no unusual noise when the tires were put on the car two months ago everything seemed normal.
Yesterday i went back to costco, told them i had this issue, they took all four tires off and rebalanced them, they do not do road force balancing. They put the tires back on the exact same wheels. The tire manager gave me my keys and said he was sorry but the tires were not balanced correctly when they sold them to me, all four were out of balance, and now corrected. I told them thanks for being honest but i had just spent two hours down there waiting for them to do balancing that should have been correctly done the first time. They gave me my money back for the balancing.
On the way back to work, nothing had changed same hum and vibration! So here are my questions. Did improper balancing and 1000 miles of use damage the susupension? Do i have bad tires? Why did it take two months and 1000K for this noise to start, and is it unrelated to tires.
Is my next step to go to the dealer for an inspection? should i go to a suspension shop and have them look at it first? also i had an alignment done at the dealer right after purchasing the tires, the worksheet showed minor corrections but nothing badly out of alignment.
Should i go back to Costco. Usually i have a clear idea what to do, this one i am not sure, any help would be appreciated. I am losing faith in costco as a tire source.