Question: what is the difference between class 3 and 4 hitch?
Answer: The main difference between a Class III hitch and a Class IV hitch is the capacities they set for the hitches. Class III hitches are rated for up to 6,000 lbs GTW with 600 lbs TW whereas a Class IV is rated for up to 12,000 lbs GTW and 1,000 TW. For more info on the hitch classifications check out the link I attached.