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patches from old inner tube?

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patches from old inner tube?

has anyone any experience of using old tube as patches? cycling a little in Africa and am running out fast, plus the old ones are coming off. i've a tube of cycle glue, but aren't too sure if i should glue the puncture, tube/patch or both. any advice would lovely?

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brush both with abrasive

brush both with abrasive paper till dark black, try touch it as less as possible and glue both, than leave cca 3 min, and press well. i use small vise and 2 pieces of flat wood. anyway is good to use punctureprotected tyres, as swalble, michelin, vittoria

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Repairing tubes

Use vulcanizing fluid as opposed to rubber cement (unfortunately, the terms are frequently used interchangeably). Vulcanizing fluid should be available at automotive repair facilities. The difference is vulcanizing fluid chemically bonds the two pieces of rubber together (the patch and the tube). Conversely, a rubber cement is a physical bond (similar to glue) and can dry out and fail.

Clean mating surfaces. Most people recommend sandpaper. I believe that the sanding process is more to remove a power coating that is on the rubber (part of the manufacturing process to allow the rubber to be removed from its manufacturing form). This being the case, just ensure that the surfaces are clean and dry.

Let the vulcanizing fluid dry for a minute or two until it no longer appears wet (it is not glue). Then apply the patch and hold it in place for another minute or two. The patching that has failed most often for me are those times I hurry the process. Putting the tube back into service before the chemical bonding agent has had sufficient time to work must be avoided; give it a couple of minutes.

People have used pieces of old tubes for patches. I don't see any issue with doing this. One of the biggest differences between cutting a patch from an old tube and a Rema patch is the Rema patch has a feathered edge and provides less to catch as the tire and tube slide over each other during normal use. Obviously, if the patch has sharp edges, there will be a tendency for the patch to catch and shift or slide. Over time (and kilometers) this can result in the patch being "ripped loose" and failing. The solution is to feather the edge of the patch as much as possible when cutting it from your old tube stock.

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perfect. thank you both for

perfect. thank you both for very comprehensive answers.

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off topic a bit...

Hi Sam,
First: thanks David, I wished I had know this ....

Only once in my touring life I successfully mounted 2 tires over the rear wheel. It protected my rear wheel for more than 20 days in India0 until it took a broken spoon to get both tires off again.

However: I have cut off the valve of a destroyed inner tube and put it between the tire and the new tube. The ride was less comfortable = bumpy, but it got me a lot further (I tend to believe) until the next flat.

BTW: At that time I was traveling with 7 inner tubes (700X28) and yet, you can never have enough (new) inner tubes ;)

Good luck!

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Tubes and failing tires

I am writing this with a smile on my face. Yes, there are those times where the damn tires won't hold air for love not money. I have moved to a little bigger tire (700x32...maybe 36...don't remember) and dropped the pressure to around 50 psi. Ya, their a bit heavier but oh so much more comfortable. (I was going to brag about not having a flat tire during the past 1200 miles, but I don't think I want to jinks my good fortune.)

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Most of the glues react to

Most of the glues react to pressure. So press patch an tube really hard together for a minute to improve their connection.

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i put one thump on top of the other when pressing.more bang for your buck!

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