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Repairing a "Dry" Tubeless Tire
If you're using a true UST tubeless tire on a UST rim, you may not require sealant. If you're running a "dry" tubeless system, you can use different techniques (such as superglue) to patch a puncture. If you're using sealant in your tire, go to our "fixing tubeless tires with sealant" page.

A large defect, such as this one, should not be repaired. Toss the tire and buy a new one. If a cut is more than 1/4 inch, it's unlikely that the repair will hold.

Note the "stress marks" on the sidewall of this tire. Flexing of the sidewall is separating the cords from the rubber. (This tire was primed to blow, because it's a light-weight non-tubeless tire, run with low pressure.) Sealant won't protect you against this type of tire failure.

Mark the spot of the puncture. You may not be able to find it once the tire is off the rim.

Let all the air out of the tire and remove it from the rim.

Pinch the tire to expose the inside of the cut or puncture.

While maintaining the pinch that forces the puncture open, put a drop of superglue into the puncture, making sure it penetrates to the inside of the tire.
Now release the pinch and push the puncture closed.

For larger punctures, and for all cuts, make a permanent repair as soon as possible. Remove the tire from the rim. (You don't need to take it all the way off, you can simply "break" one side away from the rim so the inside of the puncture is exposed.)

Clean the area of the puncture. I recommend against sanding, because you may expose the tire's cords, making the repair less secure.

Apply a thin layer of patch glue.

When the glue is dry (tacky, but not stringy, and firmly holding in place on the tire), apply a patch and press it firmly into place.
Reseat the tire. Brush a layer of soapy water around the bead of the tire where it will contact the rim. (Or for a more leak-proof seal, brush a thin layer of tire sealant around the bead.)
Force the bead out against the side of the rim. Using both hands, push your thumbs down in the center of the tire, while your fingers drag the sidewall of the tire outward. When it looks like the bead is sitting on the rim liner all the way around, you're ready to inflate.
Inflate the tire with compressed air or a CO2 inflator. You may be able to seal the bead with a good floor pump.

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