A fatbike (also called fat bike, fat tire, fat-tire bike, or snow bike) is an off-road bicycle built to accommodate 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.[1] Fatbikes are built around frames with wide forks and stays to accommodate the space required to fit these wide rims and tires. The wide tires can be used with inflation pressures as low as 34 kPa; 0.34 bar (5 psi) to allow for a smooth ride over rough obstacles. A rating of 55–69 kPa; 0.55–0.69 bar (8–10 psi) is suitable for most riders.[2] Fatbikes were developed for use in snow or sand,[1] but are capable of traversing diverse terrain types including snow, sand, desert, bogs, mud, pavement, or traditional mountain biking trails.[3]