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Tyre damage?

Old 06-26-20, 04:34 AM
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thermite
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Tyre damage?

I just got a slow puncture yesterday and it seems when I was cycling on some new road surface near me with loose gravel on it I happened to get a shard of pointy stone go through my tyre. I haven't yet taken the tyre off but would this need plugging or patching or the tyre replacing?


Last edited by thermite; 06-28-20 at 03:32 AM.
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Old 06-26-20, 04:42 AM
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Originally Posted by thermite View Post
I just got a slow puncture yesterday and it seems when I was cycling on some new road surface near me with loose gravel on it I happened to get a shard of pointy stone go through my tyre. I haven't yet taken the the off but would this need plugging or patching or the tyre replacing?

I don't think you need to patch anything. Remove the shard and keep riding.

Your tire looks a bit cracked though, if the rubber has become brittle maybe it's time to replace it.
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Old 06-26-20, 04:56 AM
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Thanks. I've only had these Schwalbe tyres for a couple of months.
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Old 06-26-20, 06:21 AM
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The strength in a tire lies in the fabric plies in the body, not the rubber. Minor surface checking like in the photo would not concern me.
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Old 06-26-20, 07:44 AM
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As noted, remove the shard, patch or replace the tube and keep riding. If, when you reinflate it, the tube shows any sign of bulging through the hole, add a patch to the inside of the tire or "boot" the hole inside with a piece of strong cloth or Tyvek.
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Old 06-28-20, 03:30 AM
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Thanks for the advice guys. Here's the shard. I won't be going near that new road surface again in a hurry.

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Old 06-28-20, 03:40 AM
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Is that another chunk of something maybe 1/4" in front of the big one?

I like to periodically inspect my whole tires and dig out any embedded glass. I'm not real regular about it, but once every month or so, or if I think I hit some glass.

The leather punch on my pocket knife seems to work well, but you could use a variety of things to dig debris out.
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Old 06-28-20, 03:46 AM
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I did spot that but think it's just a tiny speck of stone. I was riding while it was really hot a few days ago and riding over bitumen bubbles.
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Old 06-28-20, 07:20 PM
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Obviously you need to take the shard out, then all you need to do is fill in the hole with Gorilla Glue Super glue, it's ok if the glue leaves a bump on the surface because as soon as you ride the pavement will grind that off. Put the glue on and let it dry overnight, then ride like normal, when you get home check the hole, you may have to put a bit more glue on, the second application is all you need to do usually, if the hole is a bit larger it may take 3 or 4 fillings. If the hole is more than a 1/8th of an inch then you'll need to apply a Park tire boot, I would use about a dozen drops of Gorilla Glue Super glue on the patch even though the Park has a self adhesive already on the patch, the problem is that patch won't self stick for long, so the superglue will make sure it will stay put, make sure none of the glue oozes out side of the patch or the tube may stick to it, wait for it to dry then install the tube. You do that stunt on the road if you need to to get home, once your home if you can get the patch off then do so and put a new patch on using a large round motorcycle patch and industrial strength vulcanizing glue; if you can't get the Park Boot patch off then that patch is good to go for the long haul, if the Park path does come off then see below as to how to glue and clamp the patch to the tire.

If you get a sidewall gash you can even fix those, and this method will even work with tubeless tires and when it's done you won't have to use a tube. Simply get a strong sewing needle made for leather sewing; and waxed string made for leather, the wax will allow the thread to slide through the tire casing a bit easier. Then you simply stitch the gash using a cross stitch pattern across the gash in different directions. When that is done patch the tire from the inside, roughen up the underside of the tire really well; then use industrial strength vulcanizing glue, and like when patching a tube spread the glue over an area larger than the patch will cover; next get a giant size round motorcycle patch and apply it to the inside of the tire, get two pieces of wood so you can sandwich the tire and the patch between the two pieces of wood and C clamp the whole thing tight so that the patch is completely flattened against the tire, let it set for about an hour than remove the C clamp the wood; once that is done and the glue is completely dry then apply Shoe Goo to the stitches on the outside of the tire, the Shoe Goo is more flexible and sidewalls flex, Super Glue products won't work there, then spread the glue all around the stitching, as you do that you may to use more of the glue and spread that too just so the stitches are completely covered with the glue. Then just to make sure the tube doesn't stick to the tire where you glued the patch on use some baby powder or talcum powder and place it all over the patched area.

I use to repair sidewall gashes on tubular tires but since then I haven't done that, but with Covid 19 and tires being very difficult to get you may need to extend the life of the tire till your new tire comes; or you simply don't have the cash due to Covid 19 strangling your pocketbook from being out of work.
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Old 06-28-20, 07:31 PM
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If your tires are holding onto rock shards and other stuff, you need to check them regularly. If you don't remove the shards, they are just a future flat as they'll drive themselves a little deeper with every wheel revolution.

The newer and better tires don't seem to hold onto shards as bad as some older tires I've rode.
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