If that is not the oem size I am guessing you are increasing the sidewall height and it be less stable. How much less I don't know.
Also, if the oem is a 225 you are adding almost a half inch per trailer side in tire width. A wider tire doesn't go thru snow as well but it may regain some/all of the instability caused by the increased sidewall height.
That is a tall tire. Make sure you have fender clearance. If trying to run same tire/wheel on truck and trailer, I would if possible.