Step-Up Tire Step. Manufactured from durable, powder-coated steel frame with high-strength, slip-resistant plastic steps.300 lbs. weight capacity. Compatible with tires up to 14″ wide and 30″ in diameter. Easy 10 minute assembly and fast installation.Folds flat for easy transportation.Warning: This product may contain chemicals known to the state of California to cause cancer and reproductive harm. For more information, visit www.P65Warnings.ca.gov.