Tire pressure and tire section work together to determine ride properties. Nowaways lot's of people are moving to narrower tires looking for more speed, and many are compensating with crazy high tire pressures. That's a wrong approach, and leads to poor traction, more vibration, and lousy handling on poor roads. In some cases excess pressure increases the likelihood or rim failure.
At 220# you'd be far better off using a larger tire if your frame has clearance and dropping pressure back below 95psi. (possibly as low as 75-80). You won't encounter any more rolling resistance, reduce your chances of denting rims, and get a better ride.
Moving to narrower tires makes as much sense for you as putting small sports car tires on your SUV and inflating them to 50psi to get the rims off the ground.
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