I drive a 2017 QX30S... I took her in, after feeling a vibration I couldn't identify... I was told that the vibration was caused by an unusual wear pattern on the tires and would require new tires... The car has less than 18k miles on gentle driving. Would it be wise to replace the tires, before finding the underlying cause of the "unusual wear patter"? After all, Run On Flat tires are not cheep.