These limitations may prevent some disabled individuals from using scooters. In addition, scooter limitations may vary depending on model and manufacturer. A limitation of one make/model does not necessarily carry over to all. Individual needs may affect the suitability of a particular model. In general, four-wheel scooters have a larger turning radius than three-wheel scooters. In particular, a purchaser should compare length, width, turning radius and ground clearance to ensure the scooter will fit with most commonly encountered obstacles in the user's environment.