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Will 26in tubes work for 24/27/29in wheels

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Will 26in tubes work for 24/27/29in wheels

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Old 03-05-15, 01:37 PM
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E.S.
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Will 26in tubes work for 24/27/29in wheels

I'm going on a trip in a couple weeks with a bunch of cycling newbies who (I'm pretty sure) will be on a wide range of bikes with 24, 26, 27 and 29in wheels. As the trip leader it is my duty to make sure we have spare tubes, however I do not really want to buy 2-3 of each size. In a pinch, will 26in tubes work fine for the other sizes as a temporary?

Thanks for input.
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Old 03-05-15, 03:36 PM
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Assuming the tubes are presta valves yes you can use a 26er tube in a 27.5 or 29er wheel without any issues. I've ran 26ers many times in my 29er in the past. You can't run a schrader valve tube in a presta rim of coarse. I don't know about 24s. I would think wadding the tube up inside the tire would create a weak spot.
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Old 03-05-15, 09:30 PM
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Are the bikes theirs? I would get them to each get get two tubes for the their bike and carry them if so.
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Old 03-05-15, 09:57 PM
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Tubes are very flexible and expandable so many sizes can be made to work even if not ideal but I tend to agree with the above suggestion to get each participant to carry at least one tube that fits their own bike. Supplemented with a patch kit or two and a willingness to share that should be sufficient. But I've used 700c/27" tubes successfully in 26" MTB tires, 20" tires, and even in a 12" trailer tire. Presta valves can be used temporarily in rims made for Schrader valves (esp. if you protect the valve stem area with some tape), but not the other way around. But make sure that you have a pump that will work for both types of valve.
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Old 03-05-15, 11:19 PM
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i've run 26" tubes in everything up to a 29er, i've also gone the other way too and "wadded" them to fit a smaller tire. they worked, for more than 100 miles before i got around to changing them.

OTOH, if i were responsible for ensuring everyone had spare tubes, i would say, "listen up everyone! make sure you all have spare tubes for your wheels". i would probably verify that they did, including the right type of valve stem, and leave it at that.
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Old 03-06-15, 12:25 AM
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When I was studying tubeless I found a lot of people mentioning their backup tubes for their 29ers were 26x1.5 size. This sounds awkward to me, how would you install it without pinching it?

A new tube can stretch every which way but if it's patched, the patch will reinforce the area it's glued to, leading to more stretch around the patch edges to make up for it, and the tube can eventually rip by the patch. A tube that's too big can fold over and rub against itself also leading to failure.
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Old 03-08-15, 06:34 AM
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Carry a 27.5"
It's in the middle so it fits 26 and 29 without any big stretch or cram..

More Importantly I carry two tubes, one reserved for yourself only !
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