Patching Butyl Tubes - Problems
02-22-24, 01:38 PM
#51
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Better get a can as quick as ya can...
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No matter where you're at... There you are... Δf:=f(1/2)-f(-1/2)
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02-22-24, 06:33 PM
#52
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02-22-24, 06:41 PM
#53
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Something I have noticed, is that matching the tube size to the tire helps reduce the number of failed patches. When the tube has to stretch to fill the inside of the tire, it puts more stress on the patch and they start to pull away. I use the skinny tubes in my 25 mm tires and wider ones in the 28 and 32 mm tires.
I always use a kitchen timer to make sure the glue in thoroughly dry. I have also made patches out of old tubes, as well as rejoining the ends of a rubber rim strip. When gluing two pieces of rubber (vs. a patch), I put glue on both surfaces and let it dry before joining them together.
Those old Camel heat vulcanizing patches were the best, although I don't think they made any small enough for bike tires. My parents owned a truck stop in the 1970s and I put a lot of them on truck inner tubes. The second-hand smoke from one patch was probably equivalent to a pack of cigarettes.
I always use a kitchen timer to make sure the glue in thoroughly dry. I have also made patches out of old tubes, as well as rejoining the ends of a rubber rim strip. When gluing two pieces of rubber (vs. a patch), I put glue on both surfaces and let it dry before joining them together.
Those old Camel heat vulcanizing patches were the best, although I don't think they made any small enough for bike tires. My parents owned a truck stop in the 1970s and I put a lot of them on truck inner tubes. The second-hand smoke from one patch was probably equivalent to a pack of cigarettes.
02-22-24, 06:51 PM
#54
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I doubt Rema fluid is available in my country. And I can never bring it down on thd plane. I should do some looking around though.
02-24-24, 05:52 PM
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I go full Hank Hill and sand thoroughly in multiple directions, let the cement dry dry-dry, and after patching I stick it in a c clamp between a couple round-cornered pieces of planed-flat wood for a day or so.
no issues.
no issues.
02-24-24, 06:30 PM
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02-24-24, 06:57 PM
#57
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In case you are wondering.... https://youtu.be/r9hMSVQcDSA
02-25-24, 08:47 AM
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I was being facetious and my joke fell flat. Sorry
I put far more patches on a tube before I discard it. It’s not that expensive for the patch and job ($0.75 to $1.25 per patch) but putting more patches on keeps the tube out of the waste stream. Since rubber really isn’t recyclable, any amount that you can keep out of the waste stream is better. 30 is probably too many but 2 is too few.
I was describing the follow-up post-patching check, not the initial bubble check. On the first pass, yes, I go all the way around and clearly mark every discovered hole. If a tube has more than two holes, I usually discard it as the economics of patching goes way down (I consider Slime a hole for this evaluation, as it can temporarily mask holes and gum up valves). Exceptions can be made for uncommon or hard-to-find tubes.
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Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
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02-25-24, 10:33 AM
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Recycle? They come in handy for wrapping when grafting trees and adding supports. Wrapped the bike rack to protect against accidental rear door opening. There is a thread on here somewhere.
02-25-24, 11:29 AM
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I was being facetious and my joke fell flat. Sorry
I put far more patches on a tube before I discard it. It’s not that expensive for the patch and job ($0.75 to $1.25 per patch) but putting more patches on keeps the tube out of the waste stream. Since rubber really isn’t recyclable, any amount that you can keep out of the waste stream is better. 30 is probably too many but 2 is too few.
I put far more patches on a tube before I discard it. It’s not that expensive for the patch and job ($0.75 to $1.25 per patch) but putting more patches on keeps the tube out of the waste stream. Since rubber really isn’t recyclable, any amount that you can keep out of the waste stream is better. 30 is probably too many but 2 is too few.
The "more than two" is typically at one time, as I figure at so much per patch + my time that putting 3 or more patches on at once isn't efficient. But if the tube already has 8 good patches and I add one or two more, that's no biggie.
(here is where an economist would come bursting in and say "There's no difference!!" This is why we don't invite them.)
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Last edited by RCMoeur; 02-25-24 at 01:13 PM.
02-25-24, 05:16 PM
#61
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I was on a ride with Jacquie Phelan, and when we came to a scenic spot to rest and have a bite, she admonished the people who parked their bikes in the sun. She said "don't join the Park It In The Sun Hiking Club" as in you'll be walking home if you need a patch and the glue is all dried out. Though I question whether sun versus shade makes all that much difference for the little time we spent looking at the scenery, when we'd been out in the sun all day before and after the rest stop. I'd generalize the advice to "think about how old your glue is, and replace it before it dries up." Words to live by — or at least to ride (not walk) by.
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02-25-24, 05:52 PM
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Jacquie is a charmer...
02-26-24, 07:05 PM
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She was mentioned in an item that showed up on BRAIN today:
Charlie Cunningham selling unique spoke machine to support care | Bicycle Retailer and Industry News
Charlie Cunningham selling unique spoke machine to support care | Bicycle Retailer and Industry News
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02-28-24, 10:34 AM
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Yes but that step can be skipped. I’m not a fan of fishing small bits of plastic out of the tire on the next flat so I remove the plastic but nothing is harmed by leaving it in place.
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Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
02-29-24, 10:27 AM
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This is good to know. Removing the plastic has the risk of peeling the patch up. I am now good at it, but I have to be careful. Waiting until the patch has worked in an inflated tire makes it easier.
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02-29-24, 10:47 AM
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Most patches have a score in that plastic. If you bend the patch in half before you remove the foil it should release it.
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02-29-24, 10:55 AM
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Yes, that's what I usually do. Gotta pull it in the right direction.
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