I’m running G rated Westlakes on my Cedar Creek about 5500 miles now. At 110 psi, in very hot weather, my tire pressure goes up to around 125 psi and 100 degrees temp. At a rest stop the tires heat up to around 125 degrees w very little pressure gain and then cool back down to 100 degrees when I’m back on the road.
For a short recent trip my tires were at 105 psi cold. It was hot outside like 88 degrees but not as bad as the above numbers which the outside temp was over 90 degrees. I got to around 118 psi but the temperatures were around 104 psi rolling. Still good numbers but I’d rather have the psi be greater and the temperature cooler. So I’m gonna air back up to the max pressure before my next trip.
The Westlakes have a bad rep I understand for E rated tires but these g rates tires seem to be holding up very well talking to other Creek owners.
So my advice is to run max pressure on your trailer, there is less sidewall flex and cooler temps which seems to me to be a positive thing to prevent blow outs.