If it is a 205-65 run 42 psi and don't forget to pull the rear wheel at no more than 15-30-45K mile intervals to do the spline maintenance. 45K seems to good replacement point.....it will go to 60K, but the center becomes too flat and you will notice it takes more pressure on the handlebars to maintain a line in sweepers....its not objectionable but could be nicer.....for only some $110 you have got your moneys worth at 45K....never a moments concern in rain, 120 degree heat, gravel roads in Alaska....good overall tire ...JMHO..
The reason for asking if it is a 65 series, it is tall enough to absorb road shock for comfort And the 42 psi will keep the sidewall nice and stiff for positive rear end control.....
You might want to check the date code on the side wall.....I prefer mine to be no older than 3 years. Older might be OK if the tire was stored inside and no tiny cracks observed in the tread voids.....to each his own....

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