Found this topic Googling for tirepressure, wich I do almost every day.
Once got hold of the official European Formula for car tires and went running with it.
Got wiser in time and now use my own formula, wich is saver , and also found out much about tires.
Live and was born in Holland ( Europe) and call myself nowadays "Dutch Pigheaded Selfdeclared Tirepressure-specialist.
Dont think its usefull to introduce myself in a seperate topic , because I dont own a plane, but if wanted I will do so.
Tirepressure advice is all about to give the tire a deflection that gives not to much heatproduction when driving the speed its determined for.
The tiremaker calculates a maximum load for the reference-pressure , and reference speed, so it gives a sertain deflection, wich gives heatproduction so no part of rubber gets to hot.
Higher speed means more cycles a second of tire, and so more heatproduction , so deflection must be less.
And that is important for airplaines, the speed when landing and starting up, the speed you wont go over for even a minute on the ground.
On sidewall of car-tires mostly is written something like this "maximum load xxxx lbs AT yyy psi( cold)" Or behind sises Loadindex ( LI) and speedcode ( Q or higher for 160km/99m/h calculated maximum load), and tirekind determines the reference-pressure, wich is not the maximum allowed cold pressure , as given on Standard Load P-tires and XL/reinforced/Extraload.
My bet is that for the smaller airplaines , yust normal car tires are used.
So what you have to do is determine the weights on tires, wich can be different for nose wheel .
Second determine the maximum speed you wont go over for even a minute on the ground.
Then of tires read from sidewall the 3 things , 1 maximum load or loadindex, 2.Kind of tire to determine the reference-pressure wich I will call AT-pressure furtheron, 3. speedcode of tire.
then give that here and I will calculate an advice pressure.
Cant give you links to my public map of hotmail adress yet , with spreadsheets and info, only after 5 posts.
Greatings from a Pigheaded Dutch Self-declared Tirepressure-specialist.
Peter