I'm currently riding a 1980 Schwinn Continental at 46/17 for my commute. The commute has only one decent hill, and I have to stand to ride (slowly) up that. Still, I've considered going to 46/18 or 46/19 to make longer or hillier rides easier. Can someone give me an idea how much of a difference going up 1 or 2 teeth will make? I imagine it's difficult to quantify, so general impressions are fine. Thanks.
--Tom