Here is a link to a UK website with a calculator for suggested motorhome tyre pressures.

Also see their technical information guide on tyres

Below is an extract from Continental tyre catalogue for Vanco Camper tyres giving suggested tyre pressures versus actual axle weight

FA S = Front axle single tyre / RA S = Rear axle single tyre / RA T = Rear axle twin tyre (ie Duals)

A “rule of thumb” as a starting point for tyre pressures is the calculator below

Suggested tyre pressure = (Actual weight on tyre / Tyre rated weight) x Pressure at rated weight

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