To continue the thread on cuts in a tyre:
https://yacf.co.uk/forum/index.php?topic=102049.0Last week I had a rear puncture caused by a big nail that went straight in at 90 degrees to the tyre, nail was about 1.5-2mm and about 50mm long. I think it was flipped up by the front wheel to the exact orientation so that when the rear tyre hit it, it went straight in. When I pulled out the nail, the tyre deflated instantly.
I think if I rode over a nail and tried to make it puncture my rear tyre, the chances of doing it would be one in a thousand tries. Anyhow, at least I could replace the tube straightway without having to look for the cause of puncture. for the rest of the journey (about 5 miles), I didn't pump the tyre back to full pressure to reduce the chances of the hole getting bigger.
This left a 2-3mm "hole"
![](https://s3.postimg.org/nz8v5snlv/hole.jpg)
on the inside, one thread was cut, the ply under the tread prob had more, the dark line is where the cords have been pushed apart by the nail.
![](https://s12.postimg.org/ar2h4wq4d/tyre_inside.jpg)
The tyre is a Vittoria Open Corsa which I bought in 2004; when I got round to using it a month or two ago, I was surprised to see a date of 1997 stamped on the inside!
![](https://s17.postimg.org/ytqqld69b/open_corsa_date_1997.jpg)
To make the patch or "boot", I cut the patch from a lightweigh racing tyre, ideally a lightweight tub or "open tubular" where the tread is a separate rubber strip that is glued onto the casing, because you can peel the tread off. In fact I should make one from my old Vittoria Open Corsa tyres, actually I've already got one cut up but I couldn't find it so had to use an old damaged tub instead:
![](https://s9.postimg.org/6r84w4d5b/Corsa_CX_1995.jpg)
Dated 1995!
![](https://s3.postimg.org/5xl55if8z/Corsa_CX_1995_date.jpg)
I wanted to save the latex inner tube and it took a long time to cut open all the stitching:
![](https://s18.postimg.org/b9jzhd0l5/latex_tube.jpg)
section of tub
![](https://s15.postimg.org/pua93n7pn/Corsa_CX_1995_section.jpg)
top is view of the casing with the tread peeled off, bottm is the underside
![](https://s4.postimg.org/e7jlkpy3h/Tub_cut.jpg)
Next I use rubber solution to stick the patch. I've used Copydex before and that seems to work also. I also feathered the edges of the patch, and hold the tyre in a U shape, ie the shape when it's on the rim, when I stick the patch on because the tyre is very supple and tends to flatten out. Patch thickness is 0.7mm.
![](https://s23.postimg.org/kahiy2me3/patched.jpg)
The tyre pumped up showing the hole in the tread, Ideally should be filled with something.
And finally a pic of the label.
![](https://s17.postimg.org/vhjh3jbcv/fin.jpg)