Update. I have a cannondale tandem. The stoker and myself were both fairly comfortable, we do however miss the baloon tires ride quality. The new bike has 700x23 continental somethings and the Iowa roads are just garbage after this neverending winter.. The "burley" ride is due mostly to the Kenda Kommuter tires, now my question. What size of tires will fit on a cannondale? How fat of a tire will fit and what would be comparable in ride quality to the Kendas. Will I fell a decrease in speed going to a 700x37 tire for example?

Thanks,
Craig