My bike is a Rivendell, and, as I mentioned, 52cm. It's got 26" wheels for precisely that reason, the designer believes that the geometry does not allow for any bigger wheels due to toe overlap. The top tube is straight; I have not-long legs and a long torso, so the geometry works for me. The only problem is finding narrower tires for the 26" wheels. Everyone thinks they are 650s--which they are not, they are act 559s in tire size--and I have had success with mtn. bike slicks. during the non-rainy season, and the ruffy-tuffys that came with it during the rain. The pump fits on the frame just fine.