We will be shutting down the online store site from May 26th to June 6th, until our new shipments of battery packs and hub motors arrive in early June and we have a full inventory of parts again. There are exceptions if you want a motor type that we have in stock (e.g. 20" 405, 20" 5203, 16"404) or for the purchase of CycleAnalysts. Otherwise though, it will be best to just hold tight. We don't take advanced payments or pre-orders on parts until we actually have them on hand and ready to ship.