30mm 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. Honestly given Mike's reputation and crash replacement policy I would get him to make virtually identical wheels with known hubs (his Speedcific hubs are good quality) and Wheelsmith spokes.
For crits and training I wouldn't be so concerned with weight but more with stiffness. The AC350 is not a crit wheel for sure.
http://oddsandendos.safeshopper.com/2/128.htm?608
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Last edited by Grasschopper; 08-25-06 at 04:51 AM.