On the TV, I go by thread depth. I just replace the original Wrangler's just a few miles short of 50K. They still had a couple K's of wear left but I was getting a little rumble and didn't want to spend the $ to rebalance with so few miles left and we had some trips coming up.
As for the 5er, I follow the 5-6 year plan. coming up on 5 years but it will be stationary for the next year so I will wait awhile longer on them.
I don't push tires to and beyond their limits. Everything is riding on them.
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Jim B
2017 Lariat F-350 FX4, CC, SB, 6.7 PSD 4WD
2018 MONTY 3731FL, at our private winter site in GA
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