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WANTED:I have a Zipp 3000 carbon tubular tri-spoke front wheel (700c) and want to convert it to a rear wheel but need the conversion kit (some people call it a hub). I am having difficulty finding one of the kits. If anyone can help me locate one of the kits, I would greatly appreciate it. Or if you know of a rear Zipp 3000 carbon tubular tri-spoke that is for sale, please let me know about that as well. Thanks for your help!