I measured a couple new sets when I got them and found they had deeper tread in the center when new. So in my own use I'm not aiming for even tread across the width. I do suspect that higher pressure won't cause (much) reduction in center tread depth.
Mine are rated 44 psi; I'm running them at 50. Still have deeper tread in the middle after about 25K miles put on the tires which I bought new.
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Coast long and prosper.
Driving '00 Honda Insight, acquired Feb 2016.
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