I just replaced a rear one on my St2 , DT swiss double butted . Quality is superb ! Looked like surgical steel. They're so short I don't think you can measure tension. Fronts are different. I don't know the tension on those.
We are able to measure, but sometimes we had to go across one of the crossing spokes. That seemed not ideal, but it seems to be measuring fairly reliably anyway.
I just replaced a rear one on my St2 , DT swiss double butted . Quality is superb ! Looked like surgical steel. They're so short I don't think you can measure tension. Fronts are different. I don't know the tension on those.