Sarah notice how your arm with the wheel is pointed up in the second picture from the bottom? Level with frame or pointed slightly down would have been more likely original position is my guess.
There are no visible signs of wear for a torsion axle other than camper sits low or comparing the original arm angle to the current arm angle.
If you look at the new axle pictures a few posts back in post 57 in the bottom picture you can see the square shaft end welded into the right side of the arm. Right about center of picture. Note the "points" of the corners on that square shaft. They point almost straight up/down and nearly straight left/right parallel with the bracket top edge.
New they always have the points at the end of the square shaft lined up like that, as the rubber gets compressed and ages the shaft re-orients itself so the arm rides higher. Think of that video, the square shaft twists against rubber. As rubber ages the shaft does not spring back as far. So by looking at yours with the tire off and noting how much different current points on the shaft are compared to original position you can tell how many degrees it has shifted.
Notice how the arm is pointed down on the new axle. There is 22.5 degrees difference between the bracket top line and the arm center line. That is what is meant by a 22.5 down angle axle.
22.5 is more down angle than I think
Scamp normally uses. As I noted above you can use the center line point to point on the square shaft and it's angle to the center line of arm to determine original angle. Shaft which will have changed position relative to the bracket top line as rubber wears out but will have maintained same relative position to the arm welded on to it.
I'm pretty sure your trailer is sitting low but I used mine a few camping trips locally sitting lower. My wheel well cut across the rim a few inches lower than yours does in the bottom picture you posted. Have to watch out for steep driveways or steep camp sites to avoid having back end scrape. Curtain rods tended to bounce out of holders going down the road so I just set them on the cushions before hitting the road, and I would not put much
weight in the overhead cupboards but I could still hit the local state parks and use it.
Since you can get a fist between the top of the tire and the wheel well, next thing to check is to look up and see if there are scuff or rub marks from tire hitting wheel well. Spinning tire meets
fiberglass wheel well is not good for the wheel well. Might have to pull the tire to get a good look.
I did a lot of other work before I replaced the axle with the one pictured above. But I also took it easy so I would not pound the camper going down the road and planned for the expense of an axle before too long.
Campster
Humpty Dumpty was Pushed
Linear Mode
