how to get a tubeless tire to inflate that has set flat for a long period ot time?

Answer 1

high pressure air hose to insure that the bead seals against the rim. need to make sure that the valve stem or tire hasn't dryrotted though.

Answer 2

I have had that problem many times. This works most of the time: remove the tire from the vehicle and lay it flat on the floor. Wrap a rope around the circumference of the tire and tie it securely. Use a dowel to twist the rope until the bead is against the rim. Use high pressure air to start the inflation. That will cause the bead to seal with a loud POP. Remove the rope and continue inflating to the proper pressure. Check for leaks.

Answer 3

If the tire has been flat for a long time,you didn't say how long,the belt,assuming its not bias ply..may have distorted. take the valve stem out of the tire, try and inflate...if the bead has been separated there will more than likely be some rust or buildup on the rim ...you might have to have the tire unmounted ,the rim resurfaced,and the tire remounted..if the tire inflates after re-inflating, try driving it a short period of time at under hwy speed first.more than likely you will feel a "Thump" this is the distorted belt in the tire...use it only as a spare...and if at all possible just replace the tire

Answer 4

If you can't just fill it where it sits the seal at the bead is probably broken, which means the tire should be be removed from the vehicle and re-mounted. Otherwise, even if you can get it to bead up, the tire will still leak. Trust me on this, seen it a hundred times.

5 years experience in the tire industry

Answer 5

It needs a surge of pressure sufficient to seat the bead against the rim.  This requires a tire machine or the equivalent.

Answer 6

Take it to a garage and have them try with their air compressor, then see if the bead will seal itself onto the rim.