i have some things like ultegra 11 speed chains and the 34 tooth 11 speed cassettes that were expected by colorado cyclist in November and still are not here. Same with an R8000 mini group (this could be impacted by it being discontinued)
White industries T11 hubs are a 12 week leadtime if ordered directly from them
I would not plan on a specific build date unless I has parts in hand. Good luck
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