I could have used the stock hub from the BA but I would have had to buy longer spokes since the BA's and the SM's use a 15inch rear rim. I bought the 16 inch rear Thunderbird wheel because I wanted to go taller plus the Thunderbird rim uses 40 spokes instead of 32 that the BA's use. Its a case of 6 of one or a half dozen of the other. I spent $75 for a 16 inch rim and hub or use the stock hub and spend at least $75 for longer spokes. I don't think you can go wrong either way.
Fryguy