I recently upgraded my race wheels and no longer have use for these. The hubs are a Shimano 105 5700 rear and Ultegra 6600 front, laced to Kinlin tubular rims with double butted Wheelsmith spokes. The tires are Challenge Fango 32s. These wheels have only been used for 1 clinic and 3 races. They would be a great set for someone wanting try out tubulars, or someone looking to expand they're tire options.