Originally Posted by
SlimRider
I still contend that the OP will be just fine on an XL chromoly steel framed single speed bicycle. As long as the wheels are strong and the tires are filled to their optimum capacity.

As someone who live somewhere mostly flat, with high winds, I'm going to say that IMHO you're completely wrong. A strong headwind(Or anything other than directly behind you, really) is more than enough to make you want at least a few gears.
Though I just looked it up, and OKC is on average a good bit windier than Chicago. Whodathunkit.