I'm going to be buying my first tandem before long. I'm looking for a good used deal or may buy new if that doesn't work out. Here's my issue...We live on a gravel road, .8 mile one way or 1.2 mile the other way to get to the pavement. When the gravel is freshly graded, I load my bike to get to the pavement, otherwise if a nice lane is worn smooth, I ride slowly with my road bike to get to the pavement. In getting a tandem, I'm thinking I might be best off with a bike with 26" wheels so I can put on a wider tire to enable us to ride to the pavement under pretty much all conditions. What's the opinion out there? How much will I sacrifice in road performance? I put road tires on my daughters MTB and I'm pretty surprised by how well she keeps up with me on the pavement. Can I expect similar good performance on the tandem?