[dvoyer]

Hello,

I just discovered that my two sets on Campagnolo wheels doesn't weight the same.

Wheels from a 85 Spider weight about 5 pounds less than wheels from a 89 Spider. I wanted to choose the best wheels from both sets but I can't do that now... earlier wheels have CAMPAGNOLO written on the wheels too. Other than that they are identical.

 

[Kilgore Trout]

Perhaps put two light ones on the front, and two heavy ones on the rear? As you've discovered, there were at least two different makers of those style wheels.