Just to give you an idea of a 200 lb tire - my 12 year old brother can flip it once. So any adult should be able to flip it with relative ease.
My 1RM DL is 405 lbs. I can flip the tire 18 times, 18 times, and 16 times in the 3 sets of 30 seconds that I do. I go as fast as I can. I am yet to flip it 18 times the third time around -- I just don't have it in me by the time the 3rd set rolls around.
That comes to 52 reps in 90 seconds (but these are not consecutive. I take 3 minute break between sets). Usually, the feeling I have after that is very close to puking. I can just imagine how tough it will be to do 100 reps timed.
I found this challenge on youtube while searching 200 lb tire flips. Does anyone know where this challenge originated from? I am curious to see the times people have gotten for this.