Carefully examine the trailer towing guides from the truck manufacturers. It lists what '5th wheel' towing specs are for the model truck you may be interested in. We purchased a 2015 Alpine 3535RE and tow with a 2012 F350 SRW 4x4 Crew. From the 2012 Ford Trailer Towing Guide, Trailer tongue (trailer king pin for 5th-wheel towing) load weight should be 10-15% (15-25% for 5th-wheel towing) of total loaded trailer weight. Make sure vehicle payload (reduce by option weight) will accommodate trailer tongue (trailer king pin for 5th-wheel towing) load weight and weight of passengers and cargo added to towing vehicle. Addition of trailer tongue (trailer king pin for 5th-wheel towing) load weight and weight of passengers and cargo must not cause vehicle weights to exceed rear GAWR or GVWR. These ratings can be found on the vehicle Safety Compliance Certification Label. Always check the towing guide associated with the model year of the truck you are purchasing. Safe travels.
