[cblong]

depends on your truck we need some more specifics. you have a 2012 tundra with the 5.7 but do you have the crew max cab or regular cab. Im not too familiar with toyota but most tow vehicles have a sticker either on the door jam or door itself that have some weight ratios listed. take a couple pictures of them and some specifics of your truck like cab and gear ratio. also look at your tires there should be a load index or weight rating on them too. after you find those ill help decipher them for you.