I'm trying to build up my first wheel
Alex TD17 700C rim to a Shimano Alfine hub
TD17 is 605mm ERD according to their website
Shimano Alfine has a flange diameter of 104.3mm and I recorded the hub center to flange as 25mm roughly for both sides. Specs here http://bike.shimano.com/catalog/cycl...=1187815175748
Punching these numbers into a spoke calculator gave me 286mm for 32 spoke, 3 cross. I double checked the calculations by doing it in SpoCalc and also http://www.bikeschool.com/spokes/ . Both gave the same.
So I put the wheel together and the spokes just weren't sitting right, they were too long. So I took all of the spokes out and am now back at square one. I then positioned the rim on the sofa and the hub in the cente of the rim with the axle in between the cushions so it remained upright and straight. I then laid a spoke across from the hub flange to the rim in the position that spoke would be in if it were laced and to me, it sure enough seemed like it was just too long by ~10mm.