Hello all I'm taking a crack at building my first front wheel and it's not going well at all. The spokes seem too short, after I laced the wheel I started tightening the spokes...only to find they became super tight with 1/2 thread still exposed outside the nipple. In fact I could barely get a lot of the nipples on at all. This is especially discouraging because I double-checked spoke lengths before I bought them.
Sun CR-18 700C rim, ERD 612
Shimano Tiagra HB4500 front hub, 36 hole
Hub dimensions - centerline to flange 35.8mm, flange diam. 38mm, spoke hole 2.6mm
I used two different spoke calculators and they both said use 298 mm spokes. I don't know what to do at this point, I can only guess that some manufacturer data is incorrect, but I'm probably doing something stupid is more likely. Any ideas would be appreciated.