Tires on a ski jump, a competition clip from Japanese television

Which tire will roll down the ski jump fastest and jump the farthest? A Formula One tire? An enormous bulldozer tire? The smallest tire? 

This clip from Japanese television has made the rounds in years past, but the video source disappeared. We watched it again when it reappeared on Metafilter, and continue to update this page when it’s removed from YouTube. Gotta love the lab coats, white gloves, and the surprising last jump.

Which of these six tires would you guess makes the biggest jump and why?

In the archives, more physics of falling and jumping:
• Domino chain reaction
• 2,000 ping pong balls and 30 teachers in zero-g
• A cat landing on its feet
• The jumping sand flea robot

Updated video.