Were there any iterations of Campagnolo track hubs with oil ports as in NR and SR hubs? I ask only because on Ebay one often sees hubs fitting that configuration that also have the Campagnolo track axles in them. And a related question to that, was there a difference between the bearings and cones of NR-SR road hubs and track hubs?
Thank you.
Cheers.
Tom Hayes
Chagrin Falls, Ohio USA