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Motor makers make recommendations based on middle of the road info, as an example and not to change or capture this post Ford recommended 28 PSIG on a full size Bronco. On my own Bronco after reading their expert recommendation I set the pressures as they advised and then tested out the ride, handling, braking acceleration and over a two week period ended up with a 42 PSIG that seemed good.
Then a look at the side wall, will give the tire maximum air pressure and as long as your at that or below you should be fine.
The same criteria are evident with my QX4 and my 1100, there are recommendations and actual pressures that become evident as you drive in various conditions.
Your trike, being heavier, more or less stable at differing speeds and with the front tire being on the centre line more than a 2 wheeled bike will cause you to pressure up or down to get the feel, ride and any characteristics you require as long as you are meeting the static load and the maximum pressure formed into the tire.
Do you want performance and handling along with longevity, then the pressure will be decided by you as to whether your getting what you want.
Trial and error are great teachers...recommendations by makers of bikes, trikes and tires are usually for safety. With safety in your mind experimentation with the product is a very good way to find your answer. But just because you like what you have come up with does not mean you are wrong because someone else says something completely different.
I can not say exactly at what pressures and what profile tire you need to run, listen to those who have actual experiences with what you are now faced with and then decide, try and then decide again. What you do is not cast in stone, if you make a mistake you will feel it then change it. I think you will arrive at your best result in your own time. Why? Because you have posed the question.
There are many Trikers on board here, do exactly as you are doing and best of luck.
