I am not sure about my rim width, but it seems to have always worked with a 700x35 tube. I recently replaced it with a tube that is marked 700x20-28. Do you think the (presumably) wide rim/narrow tube combiantion could bring broken spokes? I might have to be more cautions here. When the tiny tube is fully inflated, the valve does not fully stick out of the rim, looking very funny.
The spokes on my rear wheel keep breaking (three so far in two weeks). Every time I replaced a spoke, the truing was OK, but it just did not stop spokes from breaking. Could there be something wrong that I did not see?
The current drive train is seven-speed. I was thinking of putting in place a wheel with a six-speed cassette. I suppose there will be fewer broken spokes. Will the six- speed cassette work with the seven-speed chain and rear derailleur?
I am not sure about my rim width, but it seems to have always worked with a 700x35 tube. I recently replaced it with a tube that is marked 700x20-28. Do you think the (presumably) wide rim/narrow tube combiantion could bring broken spokes? I might have to be more cautions here. When the tiny tube is fully inflated, the valve does not fully stick out of the rim, looking very funny.
Be aware that using an undersized tube is a risk. A risk that is not worth taking. An undersized tube inflated expands to fill the space allotted. It is blown up like a balloon. The tube walls are in tension. If (or when) the tube is punctured it can rip and deflate instantly. At speed you might lose control.
A properly sized tube is already the size of the space it is intended to fill, when inflated the tube is the same size as when deflated, and the walls are not in tension.
Be aware that using an undersized tube is a risk. A risk that is not worth taking. An undersized tube inflated expands to fill the space allotted. It is blown up like a balloon. The tube walls are in tension. If (or when) the tube is punctured it can rip and deflate instantly. At speed you might lose control.
This seems unlikely, the pressure required to increase an undersized inner tube from its nominal size to that of the tire being minimal.
A properly sized tube is already the size of the space it is intended to fill, when inflated the tube is the same size as when deflated, and the walls are not in tension.
That statement is untrue. No tube fully fills the space inside a tire and the rim well, until it is inflated, so the walls are indeed in tension. The amount of tension is certainly higher in an undersized tube, and I would agree that makes it more likely to flat suddenly.
A properly sized tube is already the size of the space it is intended to fill, when inflated the tube is the same size as when deflated, and the walls are not in tension.
That statement is untrue. No tube fully fills the space inside a tire and the rim well, until it is inflated, so the walls are indeed in tension. The amount of tension is certainly higher in an undersized tube, and I would agree that makes it more likely to flat suddenly.
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Agreed! How else could indiviual tubes be designed (as they are) to fit a range of different tire sizes?
I am not sure about my rim width, but it seems to have always worked with a 700x35 tube. I recently replaced it with a tube that is marked 700x20-28. Do you think the (presumably) wide rim/narrow tube combiantion could bring broken spokes? I might have to be more cautions here. When the tiny tube is fully inflated, the valve does not fully stick out of the rim, looking very funny.
I've asked at bike shops about spoke breakage they tell me that after one breaks they all tend to go.In my experiece this is frequently(but not always)true.
I am not sure about my rim width, but it seems to have always worked with a 700x35 tube. I recently replaced it with a tube that is marked 700x20-28. Do you think the (presumably) wide rim/narrow tube combiantion could bring broken spokes? I might have to be more cautions here. When the tiny tube is fully inflated, the valve does not fully stick out of the rim, looking very funny.
I've asked at bike shops about spoke breakage they tell me that after one breaks they all tend to go.In my experiece this is frequently(but not always)true.
If you replace a few, and then within a few months more go, it's time to respoke the wheel.
