We bought this snow chain and planed to visit the Yosemite National Park. However, we changed our plan and didn't use this snow chain. I only try to install it one time for only one tire as shown in the figure. So one chain is 100% new, the other is 99.9% new. If you want to visit mountains or east states in this winter, a snow chain is your necessary choice! The compatible tire you can refer to the last figure. Very easy to install and good price, you can learn how to install it on the Youtube https://youtu.be/pxSkLDjKeLY