Fatbike
A fatbike (also called fat bike, fat tire, fat-tire bike, or snow bike) is a bicycle with oversized tyres, typically 3.8 in (97 mm) or larger and rims 2.16 in (55 mm) or wider, designed for low ground pressure to allow riding on soft, unstable terrain, such as snow, sand, bogs and mud. Fatbikes are built around frames with wide forks and stays to accommodate the space required to fit these wide 26" rims and tires.