I run two sets. My training set is Shimano RSX hubs laced to Mavic CXP 22 rims with 36 spokes each. My racing/event set is Shimano 600 hubs laced to Mavic Open Pro rims with 32 spokes. The bike never leaves pavement. The training set is always used if I'm riding the bike paths on Hilton Head Island, and the racing/event set gets time out on the open roads of Lady's Island. There is one event up in Darlington County I use the training set on, as the roads aren't that great.