I can't say too much about cycling in Hartford, CT, but in my brief stay here (Monday-Tuesday) I located only one bike shop in the center of town and they don't rent bikes. A fellow Connecticut bike blogger indicated there are no bikes for rent in his state. Oh my! This is a sizable disappointment, as I endeavor to cycle in every city I go to. I watched several pedalers moving around during the morning rush hour here. I had hoped to be one of them, even if awkwardly scrying safe pathways through traffic lanes I don't know well.
In short, all I can offer about cycling in Hartford is my modified photo of two neglected bikes chained to a tree in the center of town: