10.21am - Thursday 22nd June 2017 15,444
For my chicken tractors I use 9" wheels that I can slide on and off of a simple axle.
For a list of free broiler chicken resources visit: https://farmmarketingsolutions.com/resources/broilers
To get your copy of my Stress-Free Chicken Tractor Plans visit: https://farmmarketingsolutions.com/store/
Wheels with bearings on Amazon: http://amzn.to/2rYT8Fa
I couldn't find a good plastic option on Amazon but they might have it at your local hardware store. You're looking for small lawn mower wheels.