Car Trailer Tires

Thank you. Mine are 6 lug (15") and have been thinking about going 16".
I'm anal about air pressure and also remove the tires during the off season.
Anybody runing load range E ? I have found a source by a company called GreenBall. in a 225/75/15 E but never heard of this MFG before.

Make sure you have enough space between the tires if your trailer is a tandem. For replacement tires I look for 10 ply rated.