2010 Toyota Tundra CrewMax Owners Manual - Page 302

2-5. Driving information Towing related term Meaning The maximum allowable gross trailer weight. Towing capacity is calculated considering base vehicle with necessary vehicle equipment and 150 pound driver. Additional optional equipment, passengers and cargo in the vehicle will reduce the towing capacity, gross trailer weight includes the trailer, cargo and necessary equipment for towing. The load placed on the trailer hitch ball. The load placed on the fifth wheel trailer hitch mount. Towing capacity 2 Tongue load King pin weight When driving Trailer tongue load ● A recommended tongue load or king pin weight varies in accordance with the types of trailers or towing as described below. ● In order to ensure the recommended values shown below, the trailer must be loaded by referring to the following instructions. 1. Conventional Towing The trailer cargo load should be distributed so that the tongue load is 9 to 11% of the gross trailer weight, not exceeding the following. (Tongue load /Gross trailer weight x 100 = 9 to 11%) If the gross trailer weight is over 2000 lbs. (907 kg), it is necessary to use a sway control device with sufficient capacity. If the gross trailer weight is over 5000 lbs. (2268 kg), it is necessary to use a weight distributing hitch with sufficient capacity. If using a weight distributing hitch when towing, keep your vehicle level with the ground. 273