One of the great things about these forums is the depth of experience available we can draw from. In my 50+ years on the road a lot has changed in technology that makes diagnosing symptoms very challenging.
Like not feeling the difference with balanced tires
or not. As noted way back when only the steering wheels were balanced they had biased ply tires
, if you lost a weight
from one you felt it right away through the manual steering system. Speed relative steering shake, wobble, shimmy, vibration then smooth again. Now days it's hard tell if a front tire is going flat. What makes you think you would "feel" tire vibration on the trailer through the hitch and all the powers systems of the tug?
On a motorcycle balance is not as important as how true to round and straight the wheel itself is. Again technology, as in cast wheels has made the art of lacing a spoke wheel nostalgic.
for trailers are a great invention, surge brakes
just slightly better than none. If you ever get to haul a trailer with surge or no brakes
, on a tug with a pintle hitch you will feel the weight
of that trailer and how relative it is to the weight
of that tug.