By keeping pressures up you can run the risk of wrecking your tyres as well as putting extra stress on shock absorbers, bearings and other driveline components. Higher pressures on rocky or rough terrain is an old school thought. In this case IMHO it is wrong.
Instead, try the 4psi method.
4psi Rule
So for me if pressures are down, speed is also down. Never go fast with low pressures and if in doubt see if the operating psi of your tyres is 4psi higher than the cold psi. If not, add pressure until it is. Has worked for me brilliantly, increases comfort and keeps SWMBO happy. A win all round

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