i use to luvvvv this stuff...cardio? bro that is a training session! u can do some fun workouts like that, idk if great for BBing, but use to do these for combat sports...
if you can go to the junk yard or tire recycling place u can pickup used tires for almost notta as well(plus u got truck to transport
)... if get a few small ones, a medium one like 100 or so lbs, and like 1 big big big one(u may pay a lil for that 1)...
push the truck
pull the truck
take a few of the smaller spare tires ,and double hand throw it from between ur legs over the top of your head like keg toss (if you got someone that will do this, u can stand about 50ft apart on a street and just toss them to each other back n forth...
take a medium size tire and punch a hole in the tread... take relatively heavy duty rope or similar and thread it thru the hole and knot it on inside the tire so it won't pop out... make a loop at the other end of the rope that u can put around your waist or hold w your hands... cheap sled alternative... u can tie it around waist and do sprints forward or backwards... you can side step w it as well... if you want to DIE, go find a bridge or hill and run it...
take big boy tire and do tire flips... or buy a sledgehammer and i like to do tabata type training on it...
i hateee cardio, and i would only do stuff like this or bag work/sparring if i was gonna do it..