Interesting stuff, Peter. Since fitting the spare wheel to the rack on my Roadster Sport I have run the rear tyres at +2psi over the fronts. Tyre wear patterns will also indicate whether the pressures are correct for the load. Too soft and both shoulders will wear more than the centre, too hard and the centre of the tread will wear first. I have run all of my previous Morgans at the spec. pressure (22 psi) for road use without any problems or abnormal tyre wear patterns developing, but I increase them for dry competition.
Don.
