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After getting a new mtb after 22 years, I got a 29'er with a tubeless setup (Stans Arch rims with WTB Nano's). I've been riding it for just over six months, and a few weeks ago I noticed a small tear (about 6mm) in the sidewall of the tire. It didn't appear to be leaking sealant or air, and I've been riding two to three times a week with no issues.

I went to ride today, and the tire was almost flat. There was sealant around the tear. I reinflated it, and it seemed to hold pressure, but after a short ride it had lost a small amount of air. I ended up going on a 16km ride but it continued to lose more air (though it didn't lose enough to be unrideable.)

My question is: Can tires be patched, or is it not worth it. Would I be better just purchasing another tire, or, would fitting an inner tube be an alternative. It would be a shame to replace the tire, as the tread has plenty of life.
 

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if the tire is still in good condition otherwise, then you can patch it from inside
sometime the sealant also gets old and it does not work anymore so well
 

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Stans dries out after about 6 months in many cases. Check the 'Best Tubeless Brew' thread.
But you might as well patch it from the inside when you have it open.
 
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