Final answer:
A 2" receiver is a class III hitch suitable for larger trailers, while a 1 1/4" receiver is a class I or II hitch designed for smaller to medium-sized loads.
Step-by-step explanation:
A 2" receiver is considered a class III hitch, whereas a 1 1/4" receiver is considered class I or II. Hitch classes are standardized to indicate the maximum weight they can safely tow. A class III hitch typically has a towing capacity ranging from 3,500 to 8,000 pounds, suitable for larger trailers, campers, and boats. In contrast, a class I hitch supports up to 2,000 pounds and is suitable for smaller loads like bike racks and small trailers, while a class II hitch can handle up to 3,500 pounds, for medium-sized trailers and similar applications.