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@Smallfurry
GA2G. Run your figures through the calculator I posted above. At a feathery 190 lbs. I am recommended 120 rear, 77 front (23mm tyres). I suspect you are running the correct PSIs, but that, as lae suggests, wider tyres would generally be recommended. But whatever works for you innit.
I have 22mm rear, 20mm front tyres n the Bob, and give them a little extra, as I have leaky latex inners. Feels fast!
I have 2,55" monsters on the 29er, which I run tubeless, a fair under the recommended lower limit. Nice grip!
My commuter tyres (32mm) varie like mad, as I like to drop the pressures when I use the bike on trails, but need to hike it right up when load carrying.
My road bike has a new 25mm rear Ultremo, as I'm too scared to go over 105 PSI on carbon clinchers.
This may all sound a bit nerdy. But considering what people are willing to pay for a slightly stiffer crankset. Spending a little time dialing in your tyre pressure for a free, and greater, ride improvement, seem obvious to me.