How much an RV can tow is based on many factors, including RV type. Each RV type will have a different rating, whether it is a Leisure Van, Class C, Class B, or Class A RV. Class A typically will have the highest tow rating. Another determining factor is the chassis manufacturer and engine type, gas, or diesel. Tow ratings can also be affected by the total weight of the RV, whether it is mostly empty or heavily loaded.