Class III hitches used for weight distributing are rated up to 10,000 lbs. gross trailer weight (GTW) with a 1000 lbs. maximum trailer tongue weight (TW) and a Class III hitch usually has a 2 inch square receiver opening. However, a higher class ball mount does not increase the overall towing capacity of the hitch. Also, Class III hitches can carry up-to five bikes when using a hitch bike rack.