speedmaster has alloy rims requiring no tubes the america has a more classic (IMHO)spoke rim but it does require tubes speed master is also geared lower...but you can change that for $20.00 either way you can't go wrong...for me it was wheels and bars that sold me on the America...
welcome to the site and HIDE your wallet!!!
there is TONS of info and Knowledge here and though THAT is free...well, just hide your wallet lol
