Colin Kaepernick trained for moments like this.

Fourth and 10 on his own 22-yard line, trailing the New Orleans Saints on the road by 3 points with one minute remaining in regulation. For Kaepernick, the San Francisco 49ers QB who spent his off-season training by heaving truck tires across a practice field, this is where the rubber meets the road.

Kaepernick took the snap, rolled to his right, surveyed the field and launched a 51-yard strike to WR Michael Crabtree to set up the game-tying field goal and send the game into overtime.

The Saints kept Kaepernick in check through 59 minutes of regulation, but they couldn’t contain his dual-threat abilities in the final minute of play. He used his legs to scramble from the pocket and his powerful arm to throw across his body and a deliver the ball on a frozen rope to a wide-open Crabtree.

That wasn’t how the Niners drew it up.

Head coach Jim Harbaugh said after the game, “That wasn’t the intent of the play. . . I am glad [Kaepernick] has the arm strength to get it that far.”

The Tire Toss Drill supplies Kaepernick with the added arm strength to throw the ball across his body late in a game.

To perform the drill, Kaepernick shuffles laterally with bands around his legs, lifts the tire, and explosively rotates his lower body and core to throw it. He says, “The shuffle side to side after the throw gives that fatigue factor and makes you challenge yourself to see if you can get the same amount of power on your next throw as you did on your last one.”

Good for Kap that he saved his best for last. And that’s good enough to win STACK NFL Beast of the Week honors.

Check out Kaepernick’s full off-season workout.