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Can I use 26 x 1 3/8 tubes with 26 x 1.25 tires?

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Can I use 26 x 1 3/8 tubes with 26 x 1.25 tires?

Old 03-29-13, 03:21 AM
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Tonymac
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Can I use 26 x 1 3/8 tubes with 26 x 1.25 tires?

Hello. Long time reader, first time poster here! This is a great forum and I hope someone can help me out here. I have a mountain bike that has 26x1.95 tires. I am thinking of putting some Michelin 26x1.25 tires on then to make them road friendly since that is what I mainly use the bike for. Tubes for that size aren't available at the department stores but are available in the bike shops for almost double the price of the tubes in department stores. So I was wondering if I could use 26 x 1 3/8 tubes for the 26 x 1.25 tires? I
Know the tires aren't interchangeable with each other but maybe tubes can be interchanged? Any help would be appreciated. Thanks all.
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Old 03-29-13, 05:12 AM
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Yes they will be close enough to work.

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Old 03-29-13, 09:12 AM
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That should work. Just make sure you put some air in the tube before installing it to prevent pinching the tube between the tire bead and rim.
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Old 03-29-13, 04:46 PM
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Originally Posted by Tonymac View Post
I have a mountain bike that has 26x1.95 tires. I am thinking of putting some Michelin 26x1.25 tires on then to make them road friendly since that is what I mainly use the bike for.
Just make sure your rims aren't too wide for tires that skinny.

http://www.schwalbetires.com/tech_in...dimensions#rim
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Old 08-25-13, 07:41 PM
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Bumping an old thread.

I am also considering buying a pair of 26x1.25 tires. You guys sure its okay to use 26x1 3/8 tubes with these tires? I'm having a hard time finding 26x1.25 tubes(schrader valve) that are reasonably priced in my area. I can, however, find plenty of 26x1 3/8 tubes(schrader valve) at the big box stores.

Last edited by richeydog; 08-25-13 at 09:55 PM.
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Old 08-25-13, 09:36 PM
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There is only 125 thousands of a inch between 1 1/4 & 1 3/8, that's only a little over 1/10 of a inch. Yeah it will work fine.
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Old 08-25-13, 09:54 PM
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EA3 rim (650A) will have a 37-590 tire on it, MTB rims are 559, a bit smaller But,

inner tubes being round balloons, will be fine..
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Old 08-25-13, 09:55 PM
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Originally Posted by TXsailor View Post
There is only 125 thousands of a inch between 1 1/4 & 1 3/8, that's only a little over 1/10 of a inch. Yeah it will work fine.
It's a fair question to ask because 26"x1-3/8" and 26"x1.25" tires are for totally different rim sizes.

In this case, things should work fine, and I share tubes between my fixed-gear with 26"x1.75" tires and my rando bike with 26"x1-3/8" tires.
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Old 08-25-13, 10:14 PM
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Thanks gentlemen. I will give it a go.
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Old 10-22-13, 10:46 PM
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Update. I bought the Nashbar Slick City Tires(26x1.25) along with some 26x1 3/8 Tubes. Today I tried to insert the tube into the tire but I won't work. The tube bulges out of the tire. No matter what I do I can't make it work. Looks like I need skinnier tubes.
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Old 10-23-13, 12:37 PM
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Look for tubes that say something like 26x 1.25 to 1.75. Your lbs should be able to help you.
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Old 10-23-13, 05:57 PM
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26" ≠ 26x 1 3/8".

Modern 26" wheels are ETRTO 559;26x1 3/8 is ETRTO 590,a different(larger) wheel size. Those tubes you got are too wide and too big around. Specialized and other companies make tubes for skinny 26" tires.
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Old 10-23-13, 06:27 PM
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I disagree. Those tubes should work fine -- try inflating the tube a little to tuck it into the tire once one of the beads is on the rim, and then let air out as needed to get it out of the way when installing the other bead.
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Old 10-23-13, 07:14 PM
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I do it all the time... I know the tires won't interchange but the tubes are a lot more flexible.

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Old 10-24-13, 06:55 PM
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Okay went to the bike shop got a few 26x1-1.5 tubes. Fit perfectly. End of story.
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Old 10-28-13, 10:16 AM
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Problem sorted! Thanks all!

Thanks everyone for your input. Sorry it took forever for me to reply. Well, was successfully able to use the 26 x 1 3/8 tubes, from my local big box store, with the 26 x 1.25 tires. They fit in with out a problem. I needed them in quick because that was the bike I was taking on vacation and it helped that they fit because if i needed to replace them, which I didn't, they would be easier (and cheaper!) to find/buy.
Thanks again for all the input!
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Old 08-08-16, 04:02 PM
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correcting lots of misinformation . . .

Sheeshes! Look at this page to sort this out:

26 Inch Bicycle Tires

"26 inch" tire and tube sizing is weird stuff with a long history, and just to give one example, "26x1 1/4" is NOT at all the same as "26x1.25" when it comes to tire and tube sizing. It's amazing that it ever got that screwy, but those are the facts. You really want to go by "ISO" measures.

And please, folks, be careful in the future not to give answers unless you're sure you know the correct answers. Or, make sure you make it clear that you're not sure about the answers. I was badly misled by several of the posts in this thread, and I ended up making a couple of trips to the bike shop, and then finally getting online and doing some research, to sort it out.
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Old 08-08-16, 04:21 PM
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Am I seeing what I am seeing? Someone resurrects an almost 3 year old thread about something that had been resolved. Why?
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Old 08-08-16, 08:36 PM
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Originally Posted by alcjphil View Post
Am I seeing what I am seeing? Someone resurrects an almost 3 year old thread about something that had been resolved. Why?
That's what happens with Zombie Threads!
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Old 08-09-16, 06:24 AM
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Originally Posted by alcjphil View Post
Am I seeing what I am seeing? Someone resurrects an almost 3 year old thread about something that had been resolved. Why?
To chastise us over something we already knew -- that 26x1.25 is not the same rim size as 26x1 3/8. Nice introduction post.
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Old 08-09-16, 06:38 AM
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Originally Posted by BlazingPedals View Post
To chastise us over something we already knew -- that 26x1.25 is not the same rim size as 26x1 3/8. Nice introduction post.


Join date of this month. Digging up an old, resolved thread. Chastising member right out of the blocks. I am guessing:
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Old 08-09-16, 06:44 AM
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In fact, prairieguy probably came upon the thread via a google search, and joined the forum just to respond. He probably never looked at the thread's date and has probably disappeared back to the prairies by now.
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