Where was I when this thread first came around.
Thanks for the info guys.
Anybody else add to this?
Here's my working set of GP4s and the GEL280/GL330. I like 'em both a lot, and can agree with previous posters' comments about the GP4 being a solid feeling wheel, without being super light. The 280/330 set really make the already good ride on a 531 frame even more responsive than on - say the vintage red Araya clinchers.