Inner tube concerns
Hi all,
So I've recently bought my fist bike and also ordered a couple of spare inner tubes to take with me when I go for a ride. The tubes have arrived the other day and I though it's better to check if they are alright (don't want any nasty surprises when dealing with a flat on the side of the road). I have inflated both tubes and they seem ok in terms of holding the air in - no punctures, haven't deflated in 24 hours or so. However whilst one tube looks perfectly fine in terms of its shape - nice perfectly circled tube, the other one looks a bit weird. As if it has "swollen" in some parts, imagine a snake that has swallowed a couple of mice and a couple of rabbits with few minute intervals (sorry couldn't think of any better way to describe how the inflated tube looks). Question - is this normal or should I send it back to the retailer and ask for a replacement? It seems to me that the rubber of the tube is thinner or softer in some parts and harder/thicker in others. Will it even up when fully inflated to the max pressure inside the tyre? I have only inflated them very slightly, only to see if they hold the air in. |
Wouldn't blip my radar.
My current peeve with inner tubers is valve stem length. Are they the right length to match your rims? |
Originally Posted by Retro Grouch
(Post 21454622)
Wouldn't blip my radar.
My current peeve with inner tubers is valve stem length. Are they the right length to match your rims? |
I don't think I have ever inflated a brand new tube before it has been installed. However, after a patch is a different story. I have seen where the 'weld', or casting seam I guess, on the rubber doesn't quite inflate the way everything else does along with the patched area. I would ride it, doesn't phase me a bit. The tire and rim is going to dictate shape in the end.
|
Originally Posted by FlMTNdude
(Post 21454660)
I don't think I have ever inflated a brand new tube before it has been installed. However, after a patch is a different story. I have seen where the 'weld', or casting seam I guess, on the rubber doesn't quite inflate the way everything else does along with the patched area. I would ride it, doesn't phase me a bit. The tire and rim is going to dictate shape in the end.
Thanks for confirming that it's normal for the tubes to inflate to different shapes though. I agree they should be fine once between the rim and the tyre. |
It is not a problem. I inflate all my tubes after patching them, most have wierd shapes. I would not worry about it.
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Most of the tubes I've inflated post patching have done this. When you install the tube in a tire, it will inflate to the shape and diameter the tire will allow.
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Originally Posted by nematers
(Post 21454641)
It's just that thing where one of the tubes looks "swollen". But if I understand correctly that is normal?
|
The tire will distribute the pressure evenly. No worries. I don't think I've ever seen a tube that was somewhat misshapen when inflated on it's own.
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Thanks everyone. I guess the case can be closed. Good to know these tubes are fine.
|
Originally Posted by nematers
(Post 21454613)
Hi all,
So I've recently bought my fist bike and also ordered a couple of spare inner tubes to take with me when I go for a ride. The tubes have arrived the other day and I though it's better to check if they are alright (don't want any nasty surprises when dealing with a flat on the side of the road). I have inflated both tubes and they seem ok in terms of holding the air in - no punctures, haven't deflated in 24 hours or so. However whilst one tube looks perfectly fine in terms of its shape - nice perfectly circled tube, the other one looks a bit weird. As if it has "swollen" in some parts, imagine a snake that has swallowed a couple of mice and a couple of rabbits with few minute intervals (sorry couldn't think of any better way to describe how the inflated tube looks). Question - is this normal or should I send it back to the retailer and ask for a replacement? It seems to me that the rubber of the tube is thinner or softer in some parts and harder/thicker in others. Will it even up when fully inflated to the max pressure inside the tyre? I have only inflated them very slightly, only to see if they hold the air in. |
Originally Posted by Ross520
(Post 21455232)
Stop inflating your spare tubes, they are fine.
|
Originally Posted by nematers
(Post 21455436)
You never had a puncture straight out the box?
How are you getting all of the air out of those tubes after inflating them? New tubes come perfectly wrapped-up and completely deflated so they’re as compact as possible and ready to fit neatly inside your jersey pocket or saddle bag. I wouldn’t ruin that on the off-chance that they’re defective. |
In my experience back when I worked in bike stores, the tubes that people bought and took home to fix their first flat had a mysteriously high rate of failure. Tubes from the same lot that we used for repairs in the shop always worked fine for us.
|
Originally Posted by nematers
(Post 21455436)
You never had a puncture straight out the box?
In fact, I might start doing that once a year to check the spare in my bag. |
Originally Posted by nematers
(Post 21455436)
You never had a puncture straight out the box?
|
Originally Posted by Retro Grouch
(Post 21454622)
Wouldn't blip my radar.
My current peeve with inner tubers is valve stem length. Are they the right length to match your rims? |
Originally Posted by nematers
(Post 21455436)
You never had a puncture straight out the box?
I’m reasonably sure though that I’ve had faulty valves straight out of the box. Still, either have been so rare that I generally mount tubes untested. By overwhelming majority, it works. |
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