On my Concorde I have ambrosio elite rims (with durex) laced with some kind of spokes (probably generic steel) to 1986 Shimano 600 Hubs (bearing sealed).
The rims and were made in the mid-late 80s but were mint when I got them to make my bike. The rims are double wall. There is no damage to the rims except for a tiny scratch that got there when a piece of metal or something got caught in my brake pads. There are no flat spots or cracks or dents in the rim.
My problem is as soon as I true the wheels, they go out of true after a ride. This is significant enough that I have to use the little break release switch (Ultegra) to space the pads out more. I figured I had just forgotten how to true wheels so I took it to an LBS that is reputable in the city and they trued the wheels. Same thing, after the first ride the wheel was significantly out of wack.
I am wondering if this is do to some kind of damage in the rim or if its the fact that I have used cheap spokes and they stretched out already. If its the rim, what should I look for when looking for damage. If its the spokes, I guess I'll just re lace them with some DT spokes or Wheelsmith right? If I use DT, which model should I get. This is my training bike, not my racing bike.
Oh, by the way, I don't use this bike like my mountain bike so its not from me bouncing on it.