Help with 26x1 3/8

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07-19-22 | 09:18 PM

#26

Bill Kapaun

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From: Mid Willamette Valley, Orygun

Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds. 2019 Giant Explore E+3

Quote:

Originally Posted by ryanvonhagan

those are my rim specs.
Rim Size: 26"
* Spoke holes: 28
* Height: 17.8 mm
* Internal Width: 17.5 mm
*External Width: 22.2 mm

Is it possible for me to have tyre sizes like 26 - 1 3/8 or 26 - 1 5/8 on this rim?
If not, what is the rim I should buy? I’d like an elaborated answer. I find this dilemma quite confusing. Please ❤️

What size is on it now?

07-22-22 | 06:41 AM

#27

Hondo6

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Joined: Sep 2021

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From: SW Florida, USA

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Quote:

Originally Posted by ryanvonhagan

Unfortunately, the one specification for you rim that you didn't post is the one needed to answer your question: the Bead Seat Diameter (BSD) of the rim. This has to match between tire and rim.

The term "26-inch tire" has been used to refer to tires fitting six different rim sizes (BSDs). They are NOT mutually interchangeable.

I assume you have tires currently mounted on your rims. If those tires are of recent manufacture, as others have stated above they'll also have the ETRTO/ISO tire size specified somewhere on the tire itself. This will be of the form "## - ###", where # is a number.

The first two numbers are the width of the tire in mm and are, to an extent, not particularly critical (there's some "wiggle room" in what size works on what width rim). However, the second group of 3 numbers is a absolutely critical; those are the BSD in mm. If those don't match your existing tires (and hence the rim), the tire in question isn't the correct BSD and won't fit.

The advice given above to read the late Sheldon Brown's article (linked early in this thread) on tire sizing is good. IMO you should take the 20 minutes or so needed to read it thoroughly.

Last edited by Hondo6; 07-22-22 at 06:46 AM.

10-25-25 | 07:17 AM

#28

reevesbyron02

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Joined: Aug 2023

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Quote:

Originally Posted by Bill Kapaun

Read the link I posted and you won't have to keep asking dumb questions.
there are 2 different 26X 1-3/8" sizes to add to the confusion.
One has a BSD of 597, while the more common is 590mm.

Lol right!!

10-25-25 | 12:57 PM

#29

grumpus

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Joined: Apr 2016

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Quote:

Originally Posted by reevesbyron02

Lol right!!

So you revived a 3 year old (originally 8 year old) thread just to make that valuable contribution?

10-25-25 | 02:05 PM

#30

maddog34

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From: NW Oregon

Bikes: 1982 Trek 930R Custom, '91 Diamondback Ascent w/ XT, XTR updates, Fuji Team Pro CF road flyer, Specialized Sirrus Gravel Convert, '09 Comencal Meta 5.5 XC, '02 Marin MBX500, '84 Gitane Criterium bike

Quote:

Originally Posted by grumpus

So you revived a 3 year old (originally 8 year old) thread just to make that valuable contribution?

this thread is the Jason Voorhees or Aliens kind.
i originally called it bad egg salad, but hey, it's almost Halloween, so...
https://www.msn.com/en-us/entertainm...d=BingNewsSerp