Jumbo JimBigger is better.This is especially true if you want to cycle in deep snow or loose sand. In these conditions only large volume combined with extremely low air pressure can help. Schwalbe's Jumbo Jim is an extremely light-bike Fat Tyre. In the usual Fat-Bike 4 inch width, it weighs less than 1000 g Alternatively, it is also available in extra wide 4.80 inches.100-559 (26 x 4.00) LiteSkin PaceStar Black100-559 (26 x 4.00) SnakeSkin, TL Easy PaceStar Black120-559 (26 x 4.80) LiteSkin PaceStar Black120-559 (26 x 4.80) SnakeSkin, TL Easy PaceStar Black