Originally Posted by Bacciagalupe

I've done lots of long rides on my Swift, including a century and two tours. I did very few mods that would impact comfort, just used a racing-style saddle and Ergon grips.

Ultimately I found it didn't work out. Half of it was that the gearing was too limited for hilly rides; the other half was that any alterations to make the bike more comfortable would involve a performance hit, and the 3rd half was that I was able to finish a century on a 700c road bike feeling like I could do another 25 miles. I definitely didn't feel that way on the Swift.

So you can do it, particularly if you aren't pacelining, if your idea of "distance" is 60 miles or less, or if the roads are REALLY good & smooth in your area, or speed is not critical, or you don't need a cushy bike, or you pick up a high-end folder. Hopefully your uses may fall into some of those categories.