After the first 1000 miles went from the factory Kenda 700x45 to Schwalbe Marathon Plus 700x38. The ride is a little more what you might call immediate, handles a bit more crisply (tough to find these words!). I wanted the Marathon Plus tires above all things, and went for the smaller size so I can use the Gaadi tube in the event of a rear tire flat in the middle of nowhere. If Gaadi makes that tube larger, I would go back to the bigger tire for the ride comfort. In the meantime, I do like the way they feel, and I've unlocked the front shock to even out the ride a bit.