Spoke size
Cyccummute I don't know whether to believe your description or to just believe Vuelta's website when they say a spoke is 4mm. I guess I'll have to go with Vuelta since I did own a pair of these type of wheels and the spokes were bigger than 2.6mm. And no they did not neck down to any 2mm sizes. I worried about a broken spoke and measured mine. I think the spokes for Vuelta are proprietary to their design so spokes might be only available from them. They never caused problems. You might take a good caliper and go find a set of these wheels and start measuring the spoke size for yourself.