Originally Posted by
cyclotoine
In the back of my mind I thought there might have been older campy hubs that looked like that. To be clear those are real "gran sport" hubs correct? Tipo being the all alloy with fewer large hole that came later?
Yes. The old Gran Sport hubs have large and small holes where the Tipo only has large holes, but not as large as the GS holes.
Gran Sport are 3-piece as krug wrote (aluminum flanges and steel cores) and the flanges taper in. The Tipo's (all aluminum) flanges are straight and parallel.