'''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
If the data came off of Shimano's web site, I have to believe they are correct. Damon Rinard's Spocalc spreadsheet doesn't list the 10-speed ultegra hub but gives the spoke hole diameter as 2.4 mm for the Dura Ace (7800) hub while DT's spoke calculator says 2.6 mm for the same hub. ?????
I'd call Shimano America for the real info. Here is the phone number: Shimano American Corp.
(949) 951-5003. They are in California so make allowences for the time zone when you call.
I thought this would be a simple question, but you have verified to me that perhaps it isn't, haha. I will call them and take my own measurements. I found competing info on various spoke calcs as well, hence why I asked.