I’m sorry I forgot to mention that I’m going with a sbp jack shaft system. I’m just waiting on gasbike to reply to me and provide me the measurements on the bike frame I need to place the order on sbp website. The bike came with a cnc hub adapter. I learned though that cnc hub adapter is a bad idea to buy. From my experience so far with wondering why the coaster brake arm was twisted bent when I got the bike. Then going threw three coaster brake arms myself just trying to correctly bend a replacement. Only to have it fail on me the same way it did on the previous owner. I’d say to anyone wanting anything better than a rag joint to skip the cnc abapter and go with a jackshaft system. Back to the spokes though. Shimano must feel like 13 gauge spoke are enough to support an electric bike with at least a 200lb person on it. I say that because before I purchased my hubs I called Shimano and asked questions about what hubs they had available and which would best suit my application. They said both of those hubs were designed for heavy duty use and or strengthened to support the “stress” of the extra weight of an electric cycle. I’ll most likely use 13 gauge spokes I would rather of course use 12 gauge but not unless It’s clear to me that punching out the hub to fit a larger spoke is not that big of a deal. Lol