I have noticed since I have returned to cycling in the last couple of years (I had never really been away from it) that the inner tubes that we can currently find locally just plain do not fit the rims. They seem to be made for larger rims (they are the size that the tires call for) and end up with folds in them. For at least 50 years I have been able to get tubes that were the right size,but not now. I have bought tubes at both Walmart and Kmart, and my son has bought tubes at the local bike shop. Is this a recent problem? Also, my son has two bikes, one with 1 inch tires and the other with 1.5 in tires, and one has rims 1 inch bigger in diameter, but both use the same tube, according to the tires (which are not the same size). My bike also uses the same size tube. The tubes DO NOT FIT. What has happened?
Cycling Equipment · Public discussion
Tubes That Fit?
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- Cycling Equipment
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- 31 July 2015
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- 4 August 2015
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- thomas pendrake
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I don't recognize your problem.
Only thing I can think of straight off is the messy sizing system. There is something like five different 26". In tires they're NOT interchangeable.
In tubes, they should be.
A too big tube might fold and chafe, while it's usually OK to run a tube that's slightly small. Unless you go way out, like a narrow road tube in a wide MTB tire, they'll stretch and fill just fine. -
What kind of wheels do you have?
Is there a chance you have 27' wheels?
28' wheels is the norm at the moment with some odd numbers recently on Mountain Bikes. (29, 27.5 )
If you need 27' tubes they are still available. A bike shop should have them or be able to order them for you.
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Bring the bike to your local bike shop and ask them to look at the tires and suggest tubes that will fit.
Bob
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The local bike shop is where my son got tubes that are too big. One of his bikes is 26 inch, the other 27. they sell him the same size tube (both tires call for the same tube!) It does not fit either. My Raleigh is a 26 inch, and the tubes are too big. Just a few years ago tubes fit the rims. Now they don't. Is there an online source for tubes that fit?
BobCochran said:
Bring the bike to your local bike shop and ask them to look at the tires and suggest tubes that will fit.
Bob
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Go back to the shop and have them put in a new tube sold by them for you. I think "fit" is a very subjective thing -- just see what they do. I feel quite sure it actually will fit. Innertubes are not high precision instruments. There is a lot of leeway.
Thanks
Bob
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Volnix said:
What kind of wheels do you have?
Is there a chance you have 27' wheels?
28' wheels is the norm at the moment with some odd numbers recently on Mountain Bikes. (29, 27.5 )
If you need 27' tubes they are still available. A bike shop should have them or be able to order them for you.
700c x 28-35mm or so should fit 27" (bike boom 10-speed) wheels. Be sure to get schrader valves.
700c is ISO 622 (bead seat diameter in millimeters). So is 28", if you're not talking about British and Indian roadsters with rod brakes. Those are ISO 635. 29" is also 622, if you're talking about mountain bikes. If you've got one of these, just choose the correct tire diameter and valve.
27" is ISO 630.
There are several sizes designated 26", ISO 571 (650c), 584 (650b), 590, and 597. Tire fit needs to be exact, but tubes have enough stretch so standard 26" tubes will fit most. Fat 650b is kind of new, so tubes for these mountain bikes will be designated 27.5"
Thanks to Sheldon Brown (sheldonbrown.comtire sizing.htmlOpen ↗) for keeping this straight.
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