Just because the #'s are the same does not mean they are exactly the same size tire.One manufacturer may be 29.5" and another may be 29.25" with the same 245/70/16. I just looked on tirerack.com and the sizes range from 29.4" to 29.6" diameter for the 245/70/16. That is why you should have 4 tires that are the same brand and size. I would get 2 more tires. shawn
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