I ordered the TerraGrips Tire Chains for my John Deere X304 lawn tractor. The rear drive tires are size 20x10x10. The ST90002 is advertised to include this size of tire plus two others. I was able to install these and they work well however it took at least 30 minutes of repositioning them in order to just get them connected. There is approximately a 10" gap between the rubber slats where the installation is made. The distance between the remaining rubber grips is approximately 4 1/2". I am assuming the 20x10x10 is at the maximum usability of these chains which is what made installation challenging. BTW - I did follow the installation instructions to the letter. Overall these chains are very well made, I just wish they were made specifically for my tire size.