How To Repair A Cut In A Tyre | MTB Maintenance

GMBN Tech · 190K views · 2018 · 15:43

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Why Bicycles Stack Exchange recommends it

Bicycles Stack Exchange answerers point people to it when a tyre has a sidewall cut that a boot or patch won't fix and stitching is the permanent option.

Recommended by 1 people across 2 different months, 2020 to 2021.

What it is

A GMBN Tech maintenance video showing how to repair a slash or cut in a mountain bike tyre, covering quick roadside fixes like a tyre boot or slug and a longer-term repair done by stitching the cut. It is presented by the GMBN Tech team and runs about 16 minutes.

What people said

Recommends Vladimir F Героям слава · 2020-02 · Bicycles Stack Exchange · on “Tire Repair / Maintenance”

You can sew the cut together using a needle and a thread. Unless you are using a tubeless setup, you do not even need to patch/seal it afterwards. If you do need to seal it, you can place a patch over the stitches. There are tutorials available on the internet. Even in the form of videos The thread to be used should be of high quality for better durability. Especialy if the cut is in are where the contact with the surface is more likely. Cotton threads deteriorate quickly when wet. Synthetic materials like nylon or at least polyester of sufficient thickness should provide better resistance. Some reported using a fishing line.

Recommends Vladimir F Героям слава · 2021-04 · Bicycles Stack Exchange · on “Sidewall cut on brand new tyre - permanent fix possible?”

No, a tyre boot will absolutely not be enough. Some side cuts are repairable by stitching [this video] . However, it is better for MTB tyres that use smaller pressures. I do not know if it is likely to work on a road tyre.

Cites Vladimir F Героям слава · 2020-04 · Bicycles Stack Exchange · on “Is there a permanent (non-emergency) patch/boot for a tire, NOT for a tube?”

It is not clear from your answer if "tiny hole" means your tubeless sealant has a problem sealing it or that your inner tube is bulging through. If the hole is really tiny, you can patch it with a tube patch. There are also dedicated tubeless tyre patches that are the same, but bigger and thicker. If the hole is really "tiny", they should work. If not, they could bulge through as well. If the hole is bigger it can be sewn together. That can be then covered with a patch from the inside and with a polyurethane glue from the outside. Only you can assess how dangerous that particular hole is and non-emergency such a repair can be. The higher pressures you use the worse it could be. Thin road tyr

Cites Phil Frost · 2020-07 · Bicycles Stack Exchange · on “Are tubeless tyres an upgrade from tubed tyres, or just different?”

Tubeless tires are objectively better in many aspects. Whether you care about those advantages or not is a different question. If you ride off-road or even on bad roads, you might want to reduce your tire pressure to provide for a smoother and more efficient ride, or for improved traction on loose surfaces. In such circumstances, a lower risk of pinch flats is a valued upgrade. For MTB tires tubeless tires have significantly less rolling resistance [LINK] . On road tires it's a mixed bag: with the Schwalbe One tubless was about the same as a butyl tube [LINK] , but on the other hand all the lowest rolling resistance road tires [LINK] are tubeless. You may not care about rolling resistance. O

Cites Ciro Santilli OurBigBook.com · 2021-08 · Bicycles Stack Exchange · on “When should you replace tires after getting a flat?”

If the rubber cut is large, replace even if the inner casing is fine I just realized I'm really stupid today. I have a Schwalbe Marathon Plus Tour Hs404 700x40c and it is quite resistant, allowing me to do a bit of gravel in between roads on my touring. On May 2021, I got my first flat on it. It was a perfectly shaped pointed stone, with a very flat base which managed to make it through. I had ridden a Schwalbe of the same type for about 2 years by then, and I know it was a rare occurrence. After I removed the stone, it left a cut of about 6mm on the exterior rubber. But the inner casing looked fine, and unless I pressed it with my hand, the cut was not very visible, so I decided to continue