A flat tire on a riding lawn mower can present quite the challenge. You're in the middle of a yard or a golf course or wherever your mowing has taken you, and the bead on your tire is compromised. The situation may seem dire, but it really isn't. You can seal the bead on your tire with a ratchet strap and a good flow of air. If you don't have a ratchet strap you can use a belt or even a rope. There aren't any other tools required.
Raise the flat tire off the ground by using a floor jack (when possible) or by moving your mower to a curb, small hill or ramp.
Engage the brake on the mower. If able, chock the tires.
Wrap a ratchet strap around the circumference of the tire, in the middle of the rubber. If a ratchet strap is unavailable you can use a rope or belt.
Tighten the ratchet strap or other implement until it compresses the tire.
Inflate the tire using an air compressor until the bead has sealed. Do not fill any further.
Remove the strap and continue to inflate the tire to the proper PSI indicated on the tire.