I want to thank everyone for their input. Those of you that think 120 lbs torque may be too much gave me cause to think about that. The printed page in the owners manual reads “Torque 110 lbs”, however, a loose change sheet was inserted in the booklet that changed the value to 120 lbs. My 23 years military training is to always go by the book, not your brain may be the cause of all my grief. 120 lbs may be stretching the studs to their break point.
When the studs break, it’s a clean break close to the drum. I’ve never had a loose lug nut or wheel.
My replacement studs have come from Dexter Axle, and, an online RV Trailer parts supply.
I try to limit the maneuvering angles I put the trailer into, I’m sure that’s when the most side force is acting on the wheels.