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patching a tube question

1382 Views 30 Replies 9 Participants Last post by  Lombard
novice here …

should a tube patch be applied with the tube inflated a few psi, or completely deflated ? or it doesn't matter ?
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What kind of patch are you using?
Are you doing it roadside or home?

Are you talking about the TPU tubes you were getting? Because everything I've read, they're impossible/difficult to patch.
What kind of patch are you using?
Are you doing it roadside or home?

Are you talking about the TPU tubes you were getting? Because everything I've read, they're impossible/difficult to patch.
hello again …

butyl and also tpu
the tube polymers stretch more than the patch (such as Park Tool GP-2).

recommendations from Park is that the patch is compatible with the aerothan.

they recommend inflation after the tube is in the tire and on the wheel.

i have inflated a tube outside of a tire with a patch on, without the tire holding the tube’s shape there is quite a bit of deformation around the patch so it would start to peel and that part of the polymer tire will not be stretching at all when the tire is inflated and under load.
hello again …

butyl and also tpu
the tube polymers stretch more than the patch (such as Park Tool GP-2).

recommendations from Park is that the patch is compatible with the aerothan.

they recommend inflation after the tube is in the tire and on the wheel.

i have inflated a tube outside of a tire with a patch on, without the tire holding the tube’s shape there is quite a bit of deformation around the patch so it would start to peel and that part of the polymer tire will not be stretching at all when the tire is inflated and under load.
Glueless patches, particularly Park GP-2 suck. Carry them for roadside emergency but don't hold much hope they'll work.

Yes, the stretching of the rubber will pull them off. So you want to limit the inflation outside of the tire.

It's best just to carry a spare tube. Swap it on the road. And patch the punctured one at home in clean environment. Use a Rema glue on patch. When done properly they never come off.

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thanks tlg

so its ok to patch with a rema when the tire is inflated to shape up to a pressure that looks like it would when installed inside the tire ?
thanks tlg

so its ok to patch with a rema when the tire is inflated to shape up to a pressure that looks like it would when installed inside the tire ?
No. You do it with the tube deflated. Outside the tire. You can't do it inflated because the glue takes time to dry. Air will leak and bubble through the glue.

got it, thanks again. so this means that the patch area not being optimally deformed when the tire is inflated ... is ok.
just wanted to confirm
got it, thanks again. so this means that the patch area not being optimally deformed when the tire is inflated ... is ok.
just wanted to confirm
Yes it's fine. These patches stretch a bit. They'll inflate fine in the tire. Nothing to worry about.
I've had tubes with 5-6 Rema patches and many years old.
can they be used for tpu ? or only butyl or latex ...
can they be used for tpu ? or only butyl or latex ...
I doubt it. Like I said, Everything I've heard patches don't work on TPU.
I just read a review about Schwalbe, they have a patch for their tubes.... and they don't work.

$30 for a tube you can't patch.
Glueless patches, particularly Park GP-2 suck. Carry them for roadside emergency but don't hold much hope they'll work.

Yes, the stretching of the rubber will pull them off. So you want to limit the inflation outside of the tire.

It's best just to carry a spare tube. Swap it on the road. And patch the punctured one at home in clean environment. Use a Rema glue on patch. When done properly they never come off.

I do agree about a spare tube, but want to note that Topeak glueless patches worked quite well for me.
I do agree about a spare tube, but want to note that Topeak glueless patches worked quite well for me.
I've had glueless patches work, as long as I prepped the tube just as I would when using Rema patches. So might as well just add glue and apply a Rema.

The big problem I've had with glueless patches is they will fail if left and not replaced with a glued on patch. Might as well just patch it right to begin with.
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I've had glueless patches work, as long as I prepped the tube just as I would when using Rema patches. So might as well just add glue and apply a Rema.

The big problem I've had with glueless patches is they will fail if left and not replaced with a glued on patch. Might as well just patch it right to begin with.
By me they hold for years. But yes, after the proper tube preparation (not on the road side).
By me they hold for years. But yes, after the proper tube preparation (not on the road side).
do you refer to latex tubes or butyl, in your case ?
do you refer to latex tubes or butyl, in your case ?
People obsess over innertubes, like somehow there is magic there. A lightweight butyl tube (like a Michelin A1) gives you 90%+ of the possible benefits over using truly low-quality garden hose innertubes. And none of the hassles and cost associated with latex and TPU tubes. Consider the fact that both of these "magic" tube materials have been on the market for decades and yet still represent a TINY share of the market. Ask yourself why that might be.
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People obsess over innertubes, like somehow there is magic there. A lightweight butyl tube (like a Michelin A1) gives you 90%+ of the possible benefits over using truly low-quality garden hose innertubes. And none of the hassles and cost associated with latex and TPU tubes. Consider the fact that both of these "magic" tube materials have been on the market for decades and yet still represent a TINY share of the market. Ask yourself why that might be.
Exactly. If you race at the top level and "every second count" they may (only may) have sense, pure gimmick otherwise.
Exactly. If you race at the top level and "every second count" they may (only may) have sense, pure gimmick otherwise.
If you race at the top level you're using tubular or tubeless. Not latex or TPU

They're not a gimmick. There's a measurable watt savings. It's a matter of if it's worth the added cost and hassle. For the average rider... no.



I have to say, TPU make great spare tubes. They take up 1/3 the space of a butyl tube. So you can carry more spares in the same space. Great if you doo long solo rides.
I've had glueless patches work, as long as I prepped the tube just as I would when using Rema patches. So might as well just add glue and apply a Rema.

The big problem I've had with glueless patches is they will fail if left and not replaced with a glued on patch. Might as well just patch it right to begin with.
Agree. The handful of times of have used a glueless patch they did not remain airtight. If I use one I will re-patch with a permanent patch
Agree. The handful of times of have used a glueless patch they did not remain airtight. If I use one I will re-patch with a permanent patch
And this is the problem I have with glueless patches; if I have air in my tires when I get home the bike is hung on its hook, and the tube isn't changed out until the tire runs flat. It may be flat when taken off the hook or during a ride sometime in the future. Either is a pain that I'd rather not bother with.

A flat is a flat, no problem, unless the cause is a failed patch, then it is a royal pain in the ass.
People obsess over innertubes, like somehow there is magic there. A lightweight butyl tube (like a Michelin A1) gives you 90%+ of the possible benefits over using truly low-quality garden hose innertubes. And none of the hassles and cost associated with latex and TPU tubes. Consider the fact that both of these "magic" tube materials have been on the market for decades and yet still represent a TINY share of the market. Ask yourself why that might be.
a few reasons come to mind … cost vs. failure rate, performance vs. cost, etc. maybe personal preference and experience w a specific material or brand.
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