This is a single tread of the enormous Crawler-Transporter used to transport the Saturn V rocket to its launch site at the Kennedy Space Center, Florida, during the Apollo program of the 1960's-1970's.
The Crawler is still in use today for transporting the Space Shuttle. Each tread weighs a ton. There are 57 treads per track and 456 treads total for the Crawler's eight tracks.
A rocket or Shuttle is mounted vertically on the Crawler. The complete Crawler weighs six million pounds and is 131 feet long and 115 feet wide. However, it travels slowly and reaches a speed of only a mile an hour. The Transporter was transferred from NASA to the NASM in 1973.
Transferred from the National Aeronautics and Space Administration