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#11
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Piece of thick old tube instead of patch?
Order some larger patches? http://www.gemplers.com/tube-repair
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#13
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Piece of thick old tube instead of patch?
Yes, Gemp is AAA.
try the LBS for a new thin wall tube sized S or greater in cross section than your stock Buy NAPA nit Rema. NAPA may sell use able patch stock but too thick $$ Cut a rectangle of thin wall sized to wrap upwards/inwards of rim so the open rec ends are near spoke holes. Arrange tools to mount tube in tire on rim. Glue up, mount tube tire n pump. Is best using a cool room. Best fir rear tire. That works PITA. Buy more t u be s or change riding style. |
#14
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Piece of thick old tube instead of patch?
Jeff Liebermann wrote:
On Sun, 16 Jul 2017 20:35:08 -0000 (UTC), Duane wrote: Jeff Liebermann wrote: On Sun, 16 Jul 2017 18:43:23 -0000 (UTC), Duane wrote: Canada started making their money out of plastic. Works the charm for a temporary patch in a slit tire. I guess any inflationary currency will work. (Sorry, but I just couldn't resist). Lol. Well Ben Franks used to work as well as George Washingtons for that matter. But the plastic pictures of someone else's queen seem to work pretty well. I just discovered that "plastic money" refers to credit cards, while "polymer banknotes" are what is used for patching tires: https://en.wikipedia.org/wiki/Polymer_banknote I must lead a sheltered life. I've never seen a polymer banknote. Looks like the queen is currently on the $20 banknote: https://www.google.com/search?q=canada+polymer+banknote&tbm=isch Too bad it has a Norway maple leaf on the front, instead of Canada maple leaf: http://www.cbc.ca/news/canada/ottawa/canada-s-new-20-bill-at-centre-of-maple-leaf-flap-1.1343767 Well they have an English queen, why not a Norwegian maple leaf.. The lowest denomination is $5, http://www.bankofcanada.ca/banknotes/bank-note-series/polymer/ which is still a rather expensive tire patch, unless you cut it into patch size pieces. Only recommended as a temporary measure to get you home. I'm talking about a sleeve inside the tire to keep the tube from popping through the slit in the tire. Looks like bicycle riding in Ottowa is ummm... thrilling: "Cyclist survives dramatic collision after running red light" (0:25) http://www.cbc.ca/news/canada/ottawa/cyclist-struck-dramatic-video-1.4207758 No helmet. Saw that. Someone here recently claimed that a cyclist hitting a car that ran a stop was at fault because it was the cyclist that hit the car. So I guess in this case, the car would have been at fault? -- duane |
#15
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Piece of thick old tube instead of patch?
On 2017-07-16 11:21, Ian Field wrote:
"Joerg" wrote in message ... Got a couple of thick tubes that are damaged because of the #%&@!! Gatorksin side wall blow-outs back when I used those tires. Expensive at around $17/pop, don't want to throw away. Fixing small tears of 1/10" or so with REMA patches works but only for 3-6 month, then they hiss through and I get a slow leak. I can ride home but it's annoying. Somehow that never worked for me - I've heard of people soaking a patch of denim in rubber solution, but I've never tried that (yet). That sounds discouraging. I have ordered another thick tube yesterday. Found it on EBay for $11. It would be nice not to have to throw away so much stuff after just one event. -- Regards, Joerg http://www.analogconsultants.com/ |
#16
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Piece of thick old tube instead of patch?
On 2017-07-16 12:19, Jeff Liebermann wrote:
On Sun, 16 Jul 2017 09:47:21 -0700, Joerg wrote: Got a couple of thick tubes that are damaged because of the #%&@!! Gatorksin side wall blow-outs back when I used those tires. Expensive at around $17/pop, don't want to throw away. Fixing small tears of 1/10" or so with REMA patches works but only for 3-6 month, then they hiss through and I get a slow leak. I can ride home but it's annoying. Using Slime Rubber Cement, is it possible to glue a roughened chunk of tube material on there instead of a REMA patch or is that a recipe for another flat? If not, are there better (= thicker) patches than REMA? If the tire and the patch are not sufficiently flexible, they will move relative to each other when stretched, causing the glue joint to crack. I would make the patch with as thin and flexible rubber material as possible so that the stretch distance is limited by rubber tire, not the patch. It's the opposite I believe. The REMA are thin and flexible and then they become brittle right over the former slit in the tube. That's where they start a slow leak. So If I could find much thicker REMA patches posssibly everything would be fine. If you use REMA patches, you get a chemical vulcanization seal. If you use a piece of inner tube and some random rubber cement, I don't know what you'll get. I suspect it'll just fall off over time. I couldn't determine if Slime Rubber Cement was the same as Rema Vulcanizing Fluid. This may help: http://forums.roadbikereview.com/general-cycling-discussion/slime-vs-rema-351443.html Maybe try some of these: https://www.google.com/#q=vulcanizing+cement You may want to do a peel strength test. We had a discussion here about that and I decided to buy a pot of Slime rubber cement after that. I fixed one flat with that which is now leaking. But not through the cemented area, it's the REMA patch itself that leaks over the old tear. -- Regards, Joerg http://www.analogconsultants.com/ |
#17
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Piece of thick old tube instead of patch?
On 2017-07-16 13:09, wrote:
On Sunday, July 16, 2017 at 9:47:26 AM UTC-7, Joerg wrote: Got a couple of thick tubes that are damaged because of the #%&@!! Gatorksin side wall blow-outs back when I used those tires. Expensive at around $17/pop, don't want to throw away. Fixing small tears of 1/10" or so with REMA patches works but only for 3-6 month, then they hiss through and I get a slow leak. I can ride home but it's annoying. Using Slime Rubber Cement, is it possible to glue a roughened chunk of tube material on there instead of a REMA patch or is that a recipe for another flat? If not, are there better (= thicker) patches than REMA? Latest advertisement for Kenda Valkyrie Pro - "bead to bead belt". Might be something to look into. The prices in the magazine are preposterous but usually the Ebay places or Amazon can get you descent prices and delivery. The CST Conquistare that I switched to supposedly also have bead-to-bead belt. However, they seem to wear about twice as fast as Gatorskins. I might have to live with that though because their side walls are so much better and so far I always found them under $20. Assuming 1250mi the rear would contribute 1.6c/mile to the operational costs of the road bike :-) -- Regards, Joerg http://www.analogconsultants.com/ |
#18
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Piece of thick old tube instead of patch?
On 2017-07-16 16:13, David Scheidt wrote:
Joerg wrote: :Got a couple of thick tubes that are damaged because of the #%&@!! :Gatorksin side wall blow-outs back when I used those tires. Expensive at :around $17/pop, don't want to throw away. Fixing small tears of 1/10" or :so with REMA patches works but only for 3-6 month, then they hiss :through and I get a slow leak. I can ride home but it's annoying. Perhaps learn to patch better? I have tubes with three inch tears that have been repaired with (many, many) Rema F1 patches. They hold in tires running from 30 to 100 psi, for years. Rema also make some bigger patches, but I don't know if you can buy them except one at a time in a kit. the trick is to sand the tube until it's rough, apply fluid, let it dry (you can't wait too long...) apply the patch, rub it firmly in place. If you have multiple non-overlapping patches, you can put them on at the same time. When you need to overlap, sand again, apply fluid, let dry, etc... I know how to fix a tire. It's the patch itself that becomes brittle over the fixed tear and then begins a slow leak at that spot. A leak through the patch itself. Possibly the reason is that my tubes have 0.120" or 3mm wall thickness so compared to the patch they are totally stiff. -- Regards, Joerg http://www.analogconsultants.com/ |
#19
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Piece of thick old tube instead of patch?
On Sunday, July 16, 2017 at 8:50:00 PM UTC-7, Jeff Liebermann wrote:
On Sun, 16 Jul 2017 18:40:27 -0700 (PDT), wrote: Order some larger patches? http://www.gemplers.com/tube-repair I dunno about that. Something like this 2" x 6" patch? http://www.gemplers.com/product/9D/Rema-6L-x-2W-Oval-Tube-Patch It requires cold vulcanizing fluid 7A or G50T. http://www.gemplers.com/product/7A http://www.gemplers.com/product/G50T At 10 patches for $25 plus chemicals, talc, shipping, and taxes, methinks using $5 Canadian polymer banknotes might be cheaper. Notice that the instructions at: http://www.gemplers.com/tech/tube-repair.htm are for an automobile tire inner tube. For bicycle tubes, methinks it might be best to apply the rather large patch on a rounded mandrel with a diameter slightly smaller than the bicycle tire, instead of the traditional flat surface. That should prevent any wrinkling, stretching, or excess tension on the patch when installed and inflated. Has my memory gotten that bad or wasn't the point of this discussion about tears in the sidewalls of tires and not large tears in tubes? |
#20
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Piece of thick old tube instead of patch?
On Mon, 17 Jul 2017 07:36:19 -0700 (PDT), wrote:
On Sunday, July 16, 2017 at 8:50:00 PM UTC-7, Jeff Liebermann wrote: On Sun, 16 Jul 2017 18:40:27 -0700 (PDT), wrote: Order some larger patches? http://www.gemplers.com/tube-repair I dunno about that. Something like this 2" x 6" patch? http://www.gemplers.com/product/9D/Rema-6L-x-2W-Oval-Tube-Patch It requires cold vulcanizing fluid 7A or G50T. http://www.gemplers.com/product/7A http://www.gemplers.com/product/G50T At 10 patches for $25 plus chemicals, talc, shipping, and taxes, methinks using $5 Canadian polymer banknotes might be cheaper. Notice that the instructions at: http://www.gemplers.com/tech/tube-repair.htm are for an automobile tire inner tube. For bicycle tubes, methinks it might be best to apply the rather large patch on a rounded mandrel with a diameter slightly smaller than the bicycle tire, instead of the traditional flat surface. That should prevent any wrinkling, stretching, or excess tension on the patch when installed and inflated. Has my memory gotten that bad or wasn't the point of this discussion about tears in the sidewalls of tires and not large tears in tubes? I read it as fixing the thick expensive inner tube. The original question: was unclear as what was being patched. The mention of leaking air was sufficient to convince me the question was about patching the tube, especially since patching the side wall of the tire is not recommended. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
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