It's actually quite hilly in this area, but none of the hills are very long. But there's precious little extended flat. Good riding area. One of my reasons for moving here is that I can bike year-round, so I can commute and not have a car. Feel free to email or pm me, also. Chapel Hill is 8 miles from Durham. You might want to decide where to live based in part on ease of getting to country roads for riding.
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"c" is not a unit that measures tire width