Does anyone know how can I repair this tyre?

[thirdcrank]

I'm with those who say "bin it" and I'd add that checking the whole bike for similar signs of neglect before buying a replacement might be worthwhile, if only to provide subjects for similar threads.

The choice is your and is yours and if you want to carry on using it, this is my method, thought up about fifty years ago at the roadside in Scotland miles from a bike shop when all the shops were shut anyway.

The main need is to stop the damage spreading when the inflated tyre is ridden. Cut a piece of strong, thinnish fabric which is longer than the damage and wider than the tyre from bead to bead when it's laid flat. Remove the tyre and line the damaged part with the fabric. There may be some modern adhesive which will hold it in place but I don't know. Ensuring that the fabric is touching the tyre everywhere, replace the tyre leaving some of the fabric protruding at each side. Carefully inflate the tyre so that the fabric is trapped between the rim and the bead. If there's any sort of dip or narrowing in the tyre at this stage it suggests that your fabric isn't close enough to the tyre and is constricting the tube inside so try again. Once it looks OK, trim off the surplus fabric on either side. This should delay further deterioration of the tyre, but not necessarily for very long. It's almost inevitable that the part of the tyre lined in this way will not stretch on inflation as much as the rest so you may feel a slight irregularity while you are riding, but I believe that trapping you fabric or "boot" in the way I've described gives it the best chance of relieving the pressure which will otherwise split your tyre.

And my advice would still be to bin it.

[David9694]

More of a concern is to investigate what caused it. You don't want a replacement to go the same way.

Any answers on the cause ?s

[Cyril Haearn]

Underinflation?
Overinflation?
Rubbing against the frame?

[PendingNewName]

Tyre blew up on the same day I made this thread.

Replaced inner tube, 3 days for continental ultra tyre delivery.

More of a concern is to investigate what caused it. You don't want a replacement to go the same way.

Any answers on the cause ?s

Do you even care?

[Gearoidmuar]

I've used tyre boots a few times. I glue them on with puncture solution on the inside of the tyre and the boot, leaving both to dry. They don't work if the boot is on the crest of the tyre as they'll bulge a bit and then burst.

This defect is too big for a boot alone, BUT there is a trick you can do if you're on a tour and a tyre isn't available.
Sew the tyre with carpet thread or similar. Then put the boot inside that. I've not done it but have seen photos by tourists off the beaten track with this cunning plan!

[David9694]

Do you even care?

Strange thing to say.

[freiston]

Do you even care?

Strange thing to say.

It has me perplexed.

[PendingNewName]

Do you even care?

Strange thing to say.

It has me perplexed.

I don't know why I even said that lol probably was drunk :p

I think maybe it was someone who cut it with a knife on purpose, .. I got 70-80 psi on a 100psi max tyre so I really don't know what could have done that while riding, maybe some metal corner like the sewers ones..

[Vorpal]

I think maybe it was someone who cut it with a knife on purpose, .. I got 70-80 psi on a 100psi max tyre so I really don't know what could have done that while riding, maybe some metal corner like the sewers ones..

It doesn't look to me like a cut. It looks worn. Do you park it in a stand with wheel rests, maybe at work? That's the sort of thing I would look for as the culprit.

Otherwise, maybe a rubbing a kerb? On a corner, or someplace you stop regularly?

How often do you check your tyre pressure? If it regularly falls low (60 psi?) and you ride it like that, it could be causing excessive deflection in the sidewall, leading to the the sidewall failing. Or if you are quite heavy for riding on 70 psi, it could have a similar result.

It also looks like the sidewall of the tyre is damaged along the same line at other points on the circumference, so unless it was a quality issue with that particular tyre, the same thing is likely to happen to your new one, if you don't figure out why it happened.

[Brucey]

wheel could be slightly buckled and tyre rubbed on the chainstay, mudguard or something.

cheers

[Vorpal]

wheel could be slightly buckled and tyre rubbed on the chainstay, mudguard or something.

cheers

good point