Need help with Tube size.
#1
Newbie
Thread Starter
Need help with Tube size.
I have what I believe is a Spin Mtb Trispoke. I found the right tire size which was 26 x 1 1/8. Problem is I cant find the right tube. I've tried two tubes one from Continental which was a Tour 26 (650C) ALL. and one from SHWABLE Sv 13. Both were too big. I looked online but I'm only confusing myself. Any help is appreciated.
#2
Senior Member
Join Date: Jan 2009
Location: San Diego, CA
Posts: 3,651
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 835 Post(s)
Liked 1,056 Times
in
741 Posts
Easier to find the metric equivalent versions listed which would be 650 x 28mm wide. You can fudge the width a few millimeters in each direction (23-34 or so) but a little narrower is better than wider.
Likes For Crankycrank:
#3
The dropped
Join Date: Oct 2018
Location: Columbus, OH
Posts: 2,406
Bikes: Pake C'Mute Touring/Commuter Build, 1989 Kona Cinder Cone, 1995 Trek 5200, 1973 Raleigh Super Course FG, 1960/61 Montgomery Ward Hawthorne "thrift" 3 speed, by Hercules (sold) : 1966 Schwinn Deluxe Racer (sold)
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 1739 Post(s)
Liked 1,014 Times
in
696 Posts
Consider specialized tubes. You'll be able to find a tube to fit with the right stem for your rim. Just like 700C tubes can be used with 27" wheels, you can use 650B tubes with 26" wheels. Since 650B wheels are intended as smaller road wheels, they're more available in narrow widths.
Likes For Unca_Sam:
#4
Senior Member
Join Date: Feb 2004
Location: St Peters, Missouri
Posts: 30,225
Bikes: Catrike 559 I own some others but they don't get ridden very much.
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1572 Post(s)
Liked 642 Times
in
363 Posts
I find that sourcing the exact size bicycle inner tube that I want to be a frustrating experience.
This winter I changed tires on our recumbent trikes. I wanted erto 406 x 2.0 inner tubes with 40 mm Presta valve stems and erto 559 X 2.0 inner tubes with 40 mm Presta stems. One can burn a lot of gas chasing from LBS to LBS searching for those exact combinations. I can find what I want on the internet but was amazed at the range in prices and shipping times required by some vendors. I can understand settling for a "not exactly" inner tube in a pinch (pun intended), but if I'm buying tubes in February, I want what I want.
This winter I changed tires on our recumbent trikes. I wanted erto 406 x 2.0 inner tubes with 40 mm Presta valve stems and erto 559 X 2.0 inner tubes with 40 mm Presta stems. One can burn a lot of gas chasing from LBS to LBS searching for those exact combinations. I can find what I want on the internet but was amazed at the range in prices and shipping times required by some vendors. I can understand settling for a "not exactly" inner tube in a pinch (pun intended), but if I'm buying tubes in February, I want what I want.
__________________
My greatest fear is all of my kids standing around my coffin and talking about "how sensible" dad was.
My greatest fear is all of my kids standing around my coffin and talking about "how sensible" dad was.
#5
Senior Member
Join Date: Jan 2005
Location: Baltimore, MD
Posts: 5,340
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 2430 Post(s)
Liked 2,889 Times
in
1,646 Posts
You're sure that the Mtb Trispoke wheel takes a 26 x 1 1/8 tire and tube, or are you assuming that the "26 x 1.125" on the tire means the same thing? Mtb tire sizes are almost invariably expressed as decimals:
e.g., 26 x 1.75, 26 x 2.125.
The late Sheldon Brown's intro to tire sizingFrom that page:
If two tires are marked with sizes that are mathematically equal,
but one is expressed as a decimal and the other as a fraction,
these two tires will not be interchangeable.
e.g., 26 x 1.75, 26 x 2.125.
The late Sheldon Brown's intro to tire sizing
From that page:
Brown's Law Of Tire Sizing:
If two tires are marked with sizes that are mathematically equal,but one is expressed as a decimal and the other as a fraction,
these two tires will not be interchangeable.
Likes For Trakhak:
#6
I'm good to go!
Join Date: Jul 2017
Location: Mississippi
Posts: 14,811
Bikes: Tarmac Disc Comp Di2 - 2020
Mentioned: 50 Post(s)
Tagged: 0 Thread(s)
Quoted: 6100 Post(s)
Liked 4,732 Times
in
3,262 Posts
Find the ISO/ETRTO or what Crankycrank called the metric size of the tire, It's on there somewhere. Some mfrs. make it reasonably prominent, but others only have it molded in the tiniest of print somewhere on the sidewall. Then look for a tube that both measurements are within. Tubes are generally made to fit tires of various widths. So you have to look for a tube that your tire is within it's range, Though last time I had to look, it did seem like tube makers were trying to further simply things by giving little information about such.
If I couldn't find a tube my tire is within the range specified, then I'd go with a small width tube before bigger width.
Oh.... also some mfrs of use a bastardized form of ISO/ETRTO and will state 700 or 700C instead of the correct BSD number of 622. Don't know if they do that for other sizes such as your 650.
If I couldn't find a tube my tire is within the range specified, then I'd go with a small width tube before bigger width.
Oh.... also some mfrs of use a bastardized form of ISO/ETRTO and will state 700 or 700C instead of the correct BSD number of 622. Don't know if they do that for other sizes such as your 650.
#7
Newbie
Thread Starter
So I actually got some tubes from specialized that Unca_Sam recommended . They were 26 x 1.0 - 1.25. Fits perfectly. Should've mentioned that this mtb rim was going on a track bike. So I was looking for a tire that was narrow enough to fit the fork.
Likes For Sobeisdead:
#8
Senior Member
Join Date: Jan 2017
Posts: 1,064
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 350 Post(s)
Likes: 0
Liked 122 Times
in
90 Posts
It's better if you learn the metric ETRTO size for next time you need to shop for stuff. I would guess almost every mainstream manufacturer will give metric specifications, because ETRTO is a more precise measurement of compatibility to 1 millimeter. There are 25.4mm in 1 inch. When sizes are given in inches, you won't be able to tell how close that last fraction of an inch is to the next whole inch, unless you know the archaic relationship of the inch width standard to it's diameter.
https://www.schwalbe.com/en/groessenbezeichnung
Tubes are easy to find in Europe. Schwalbe makes them in almost every size and there are giant internet retailers who stock them all, like bike24. And they really do arrive in 1-2 days when you order before 1pm (depending on how far you are located from their warehouse).
https://www.schwalbe.com/en/groessenbezeichnung
Tubes are easy to find in Europe. Schwalbe makes them in almost every size and there are giant internet retailers who stock them all, like bike24. And they really do arrive in 1-2 days when you order before 1pm (depending on how far you are located from their warehouse).
Last edited by tomtomtom123; 02-27-20 at 11:00 PM.
#9
Senior Member
Join Date: Aug 2009
Posts: 1,735
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 476 Post(s)
Liked 575 Times
in
343 Posts
I hear you can write messages on small pieces of paper and train pigeons to deliver them, at least until someone develops a way to transmit the human voice over vast distances, but with the price of crude, driving might make more sense...