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How to Repair a Sidewall Gash in a Bike Tire


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Finish your Stitches to Repair the Split
Using a needle and dental floss to repair a gash in a bike tire sidewall
David Fiedler

Once you've finished with your stitches, you'll tie a knot using the two ends of the floss. The first end comes from the knot at the end of the floss you made when we first started; the other end is simply what's left from the front end where the needle was. Tying this off is important to keep the stitches in place and prevent the floss from unraveling. A simple square knot will do the trick; make this knot inside the tire and use a scissors or fingernail clippers to trim off any excess length.

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