After you get used to riding it, pump the tire up to 20psi. The higher pressure noticably increased range for me, but it is a bumpier and less stable ride. I'd try higher, but that voids the warranty. Rode 14.5 kilometers today with 17% left on mostly paved trails, but some gravel, loose sand, and hard packed dirt with a couple decent hills, and nothing flat. I weigh 81.6 kilograms, and was getting 12.9 - 16.1 kilometers to empty at stock pressure, relatively flat, paved surfaces. If you're going for distance avoid grass, it kills range.