How about a Spitfire 5?

I would guess from the seat height that you are fairly tall. You won't hear me say this very often but I think the mtn bike would probably be more comfortable for you. I personally like cruisers and your Schwinn is very nice but I feel you will be cramped on it. Just my opinion...Kelly

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I'm racin' Spitfire, turnin', poppin' wheelies, burnin' evil chasin' pop,pop, pop,pop,pop.... (The Pixies-Tony's theme)

All you would have to do is take the sprocket into a machine shop and have a big hole drilled in it.