Without the data, we can't tell you they're inherently less safe. I can tell you they're made with a smaller belt package. That's what we call it. When we break these tires down to try to retread them, they cannot safely hold a retreaded tire.
These tires are not tires you would stick on the steer axle of a vehicle, because they're lightweight and poorly manufactured. The heavier-duty, premium tires go on the steer axle, so they put these on trailers where they can fail and not cause an accident, but they fail at an alarming rate compared to a high-quality tire. That part we do know.