Originally Posted by Grasschopper
300 Niobium rim? I am guessing that is the same rim Mike Garcia is using and the low profile one is probably the same as the IRD rim. I would be concerned with the stiffness of these rims...a couple more spokes on each will only bring the weight up a tad but could really help the durability.
http://oddsandendos.safeshopper.com/2/128.htm?608
Niobium 300 has a fairly deep section, while the Cadence is a low profile. I understand MG's mostly making use of the Velocity aero rim for his low profile wheels.
I've made 3 sets with the IRD Cadence rims, and yes. You do not want to build those with less than 32 spokes. A spoke count less than that would make vertical truing a problem as they're quite sensible for over tension, meaning they're far from stiff enough to use with a low spoke count. For the 300 I guess it could do with less spokes.