2011 Toyota Tacoma Regular Cab Owners Manual - Page 780

2-5. Driving information n TWR (Trailer Weight Rating) (With brakes) The maximum allowable gross trailer weight. The gross trailer weight is the sum of the trailer weight and the weight of the cargo in the trailer. TWR is calculated assuming base vehicle with one driver, one front passenger, towing package (if available), hitch and hitch systems (if required). Additional optional equipment, passengers and cargo in the vehicle will reduce the trailer weight rating so as not to exceed GCWR, GVWR and GAWR. n Unbraked TWR (Unbraked Trailer Weight Rating) (Without brakes) The trailer weight rating for towing a trailer without a trailer service brake system. n Tongue Weight The load placed on the trailer hitch ball. (→P. 222) 216