not all tires are the same, the rubber is diferent, i have had tires that squell when parking in a parking space and tires that didnt squeel ever! not even when peeling out(tis was on my pick up truck) they were high mileage tires. strange isnt it. i wouldnt worry about it if your were, besides a 30MPH U-Turn, thats pretty damn fast!
later
will

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'73 VW camper
'80 300td wagon