Different PSI sweet spot for each bike/tire type. Road bike 100 to 110 psi, Mountain bike 25 to 35 psi, Fatbike 5 to 10 psi. I know what some of the studies say and maybe it is a mind over matter thing but I have always found I can go much faster with as little as a 5 psi increase in tire pressure. Not as comfortable but faster!
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