Features and Benefits Made in USA Huge 5 3/8" wheels will easily roll over dirt or gravel with a firm substrate Comfortable ergonomic design Lifetime warranty on wheels and casters 400 lb. capacity The Rough Rider™ is a beefed up version of the Bone™, made specifically to be used outdoors in less than ideal conditions. Extremely popular with military, police, and other government agencies in the US and Canada. The Rough Rider™ is designed to be used on extremely rough pavement, dirt, and even grass and gravel with a firm substrate! 400LB CAPACITY