Kevin is right, it was largely a fashion. The hubs are called Large Flaange and not the modern intepretation, High flange, and were the provence of the track and TT rider and only became the Road mans choice after the war. I know they were supposed to build a stronger wheel, but I was a sprinter and I can tell you it never made an ounce of difference. Track men were never seen on small flange hubs and even though Campag were around, Brit and most continental track riders used Airlite, which had a slightly higher flange, but by the mid 60s this fashion also faded and the trackmen were by and large on Campag. I see the fahion is now creeping back with the fixie boys and we are now getting a mixture of small and large on the same axle. As far as holes go, track men used 28s and road men 32/36 or, as I n my case, srinters used 36/40, though I can safely say it didnt make a zits diference. I won a hard road race on arough surface in a bunch sprint with some mad descents on a pair of 32s once and didnt even know until my wheel builder told me after! Its all a fsshion. I use large flange Campag on my Sper Corsa, but small on the Colnago, they both look good and were all to old to use them to their utmost! so use what you want and feel good. Incidently. I have a 70s Colnago Sport,211/2 in old money, better condition than that one that sold for loads of mullar, any one interested? Barrie Carter, Roundham, UK