Your links did not work for me, so I could not view your pictures.
You may have a brakes problem.
I had a similar occurrance that came to my attention via a blowout.
Later investigation revealed that two wheels had leaking grease seals making the brakes much less effective on these wheels. The two good wheels were essentially doing all the braking work and were locking up the wheels causing the worn flat spots. I am guessing the majority of the wear occurred during one hard stop when a highway traffic light turned yellow as I was very near the intersection.
As a test to see if this could be your problem, find a dirt road with no traffic and intentionally make a stop from about 5 mph using only your trailer brakes with the controller set to a strong value.
Get out and look to see if all four wheels have locked up as evidenced by a little pile of dirt pushed in front of each tire.
What you might see is some wheels do not lock up while others are doing most of the braking work.
If all four wheels locked up OK, then your brakes may be OK and then you could consider other causes such as balance or alignment.
Originally Posted by daydreamer36535
in preparation for a trip I was checking the tires out and have found
a problem i'm confused/concerned about.
see pic at http://www.gulftel.com/3strong/tire1.jpg
This is on a 1974 ambassador, 29'.
So, dual axle and the problem is on one side only.
I see no loose bolts ect.
also it seems this problem occured within the last 1000 miles as I just checked the tire pressure before coming home on the last trip.
As you look at the tire, there is deep wear for 2-3" then all is well
for about 6" - 16" then another deep wear pattern, all around the
tire. This occured on both tires. Its almost like the tire is trying to become square in spots.
What could be the cause?