Do you put patched tubes back in your saddlebag?
#101
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There's lots of environmental and work safety pressure to eliminate the use of cyclohexamine, and there are alternative chemistries that work just as well. the zinc thiocarmates require an activator, which is usually stearic acid, or zinc oxide in combination with stearic acid. None of these require use at levels that show up on SDS, because the SDS is about work place and transport safety, not reverse engineering the trade secrets of products.
Zinc oxide, by the way, wouldn’t be in any vulcanizing fluid for patching. It’s not soluble in the organic solvents used in any of the fluids, whether rubber cement or vulcanizing fluid. It seems to be used in the hot vulcanization
I know that the SDS isn’t for reverse engineering a product but it can give valuable information on what’s in a substance.
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Stuart Black
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!
#102
Junior Member
The spoke bolts inside all wire wheels I ever had sooner or later make pin-hole leaks in the inner-tube. I tried care in placing the rubber gasket in place which is supposed to prevent this but it still did not work. I purchased a set of smooth interior mag wheels which have no wire spokes and no spoke bolts and it has been almost two years with never a leak since. The wheels came from China and claim to be lighter than wire wheels but since I do not compete in races to ride into town for my groceries I don't care.
#103
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unless you know of a problem with your patching technique - they should be better than new
(now one place is 2 layers deep )
(now one place is 2 layers deep )
#104
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The spoke bolts inside all wire wheels I ever had sooner or later make pin-hole leaks in the inner-tube. I tried care in placing the rubber gasket in place which is supposed to prevent this but it still did not work. I purchased a set of smooth interior mag wheels which have no wire spokes and no spoke bolts and it has been almost two years with never a leak since. The wheels came from China and claim to be lighter than wire wheels but since I do not compete in races to ride into town for my groceries I don't care.
#105
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Not to jinx myself, but I must be living a charmed life as I've gotten maybe a half dozen flats in the past 11 years (5,000 miles this year and one flat). And, most of my flats have been because the stem broke away from the tube (two of them I noticed while the bike was in the garage so no need to change on the road). So, my view is skewed based on my experience. I carry a patch kit but have never used it, partly because I'm a klutz and would probably screw up gluing it on, but mostly because my tubes have lasted a long time without flatting due to a puncture. So, I don't have practice patching and, given my infrequency of flats, I wouldn't be surprised if the glue hasn't dried up and become ineffective (I'm assuming that happens??). My position is to just toss the tube when it flats, even on the rare occasion it's a puncture - up til now, they've always lasted a long time.
#106
Junior Member
Replaced a flat during a ride with a new tube from my saddlebag. Brought the flat home and found the hole. Patched it. Is it safe to put it back in the saddlebag for next time or does folding it ruin the patch or cause it to tear or or anything?
I would obviously roll up the tube so the patch wasn’t on a bend but...
Thoughts?
and to be clear sure I could take out the tube I replaced with yesterday and the put the patched tube back in the tire and roll up the spare tube again and put it back in my bag but man I just don’t feel like it!
I would obviously roll up the tube so the patch wasn’t on a bend but...
Thoughts?
and to be clear sure I could take out the tube I replaced with yesterday and the put the patched tube back in the tire and roll up the spare tube again and put it back in my bag but man I just don’t feel like it!
#107
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We need a link for these $2 tubes...
#108
Junior Member
I only put a patched tube back into my saddle pack on my touring bike, never on my
road bike. I'm running tubeless on my gravel and mountain bike.
road bike. I'm running tubeless on my gravel and mountain bike.
#109
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Replaced a flat during a ride with a new tube from my saddlebag. Brought the flat home and found the hole. Patched it. Is it safe to put it back in the saddlebag for next time or does folding it ruin the patch or cause it to tear or or anything?
I would obviously roll up the tube so the patch wasn’t on a bend but...
Thoughts?
and to be clear sure I could take out the tube I replaced with yesterday and the put the patched tube back in the tire and roll up the spare tube again and put it back in my bag but man I just don’t feel like it!
I would obviously roll up the tube so the patch wasn’t on a bend but...
Thoughts?
and to be clear sure I could take out the tube I replaced with yesterday and the put the patched tube back in the tire and roll up the spare tube again and put it back in my bag but man I just don’t feel like it!
#110
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My patched tubes go back on the tire, I'll only use a spare if the patch job fails. If that happens I re-patch the tube at home and it goes back on the tire. I don't get many flats fortunately.
#111
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Safe? Sure. Worst case, you put a leaky tube back on and use up an inflator or some arm strength squeezing the mini pump. I reused previously punctured tubes all the time in my college days (some with more than 1 patch). Now, the $2 for a new tube seems like a cheap alternative to patching, rolling, and hoping on an already punctured tube is road worthy.
#112
Senior Member
One would think that after 40-50 years of riding that I could patch a tube but I've had a few failures lately right at the patch. One thing about testing tubes (overnight) is that the tube has to be inside a tire to test it under pressure. It takes very little pressure to inflate outside a tire, so it's not a solid test.
#113
Member
Yes, install the other I had with me, and ride on. Ive used tures with numerous patches in them, for spares. As long as it works.
#114
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#115
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One would think that after 40-50 years of riding that I could patch a tube but I've had a few failures lately right at the patch. One thing about testing tubes (overnight) is that the tube has to be inside a tire to test it under pressure. It takes very little pressure to inflate outside a tire, so it's not a solid test.
#116
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My first experience with patching a tire was in the early 60's on a trip down 99 to San Diego in a 49' Chevy pickup. We got a flat and my Dad pulled the split ring, hot patched the tube and hand pumped it back up. Bikes are so much harder, lol...
#117
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Replaced a flat during a ride with a new tube from my saddlebag. Brought the flat home and found the hole. Patched it. Is it safe to put it back in the saddlebag for next time or does folding it ruin the patch or cause it to tear or or anything?
I would obviously roll up the tube so the patch wasn’t on a bend but...
Thoughts?
and to be clear sure I could take out the tube I replaced with yesterday and the put the patched tube back in the tire and roll up the spare tube again and put it back in my bag but man I just don’t feel like it!
I would obviously roll up the tube so the patch wasn’t on a bend but...
Thoughts?
and to be clear sure I could take out the tube I replaced with yesterday and the put the patched tube back in the tire and roll up the spare tube again and put it back in my bag but man I just don’t feel like it!
#118
Member
I'm mostly on tubeless these days, but I still have one set of wheels that's tubed, or sometimes. And on those, I've taken to putting ~15-20mL of sealant that I use on my tubeless wheels, into the inner tubes. Pulled a 1.5" staple out of a tire this past summer - spit a bit for ~5sec., but then I rode the 20km home still on ~100psi.
#119
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#120
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Funny, as another person mentioned I also run the patched tube and only carry new tubes in my bags. A patch can fail if it's not done well, something I don't want to find out after the tube in my tire also has a hole in it.
Something I see very rarely so I always mention it: the spare tubes I carry are wrapped in duct tape or masking tape. This prevents them from wearing holes in the corners as they vibrate around in your bag. I get so few flats that a spare tube might be carried around for a year or two and many thousands of miles. The last thing I want is for it to be full of holes and completely useless!
Something I see very rarely so I always mention it: the spare tubes I carry are wrapped in duct tape or masking tape. This prevents them from wearing holes in the corners as they vibrate around in your bag. I get so few flats that a spare tube might be carried around for a year or two and many thousands of miles. The last thing I want is for it to be full of holes and completely useless!
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#121
Junior Member
in my experience (5000+ miles/yr for 30+ yrs), the cost of the tube matters very little, but a patch always affects the feel of the ride and eventually works loose. To each his own i guess.
#122
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Wow. Glad I never raced against you. Anyone that can tell they are riding on a patched tube has sensitivity far beyond my abilities. I've had some patches fail to work but I've never had one fail once it's successfully holding air. Lucky I guess.😊
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#123
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T
funny. Keep the wheels down friend.
#125
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When a patch works its way loose at any time that means you prepared the tube wrong, I've never had either a glue on or a glueless patch eventually work loose...well, as long as the glueless patch was a Park, I used a few other brands, even the well known Lezyne, those don't stick for more than a few hours, but the Park brand will stick for the life of the tube.
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