OK, so I had the Maxx's put on with 163,220 on the odometer. Today, I'm at 169,700. That's, hmm, let's see, 6480 miles. My depth gauge today read just a hair (hare?, rabbit?) over 17/32. The original tread depth (according to Coopers website) is 18.5/32 (my gauge read about 19/32). If I go...