Even if you can change tractor tires blindfolded, you'll find useful information in the tire safety portion of Gempler's Web site.
Step-by-step instructions with photos give the proper way to measure tires and rims, break troublesome tire beads, empty and fill liquid ballast, and mount and dismount tires. There are tips to help prevent accidents, and the site offers all the necessary tools and supplies for making repairs, and almost any tire you could ever need. There is also a tire specialist (with 30 years experience) you can call or e-mail with technical questions. Contact Gempler's, Dept. FIN, Box 270, Belleville, WI 53508, 800/382-8473.