What does 26x1.5/559 mean?
#2
Senior Member
559mm is the diameter that the tire bead sits at. This is the same as the "26er" wheel size that dominated on older mountain bikes.
1.5" is the nominal inflated width of the tire (inflated tire width can vary a little depending on the width of the rim it's mounted on).
So this tire mounts on a 559mm BSD ("26er") rim, and it inflates to around 1.5" wide, which is about 38mm.
The "26" is a marketing term very roughly based on the diameter of the inflated tire, in inches. But be careful:
https://www.sheldonbrown.com/26.html
1.5" is the nominal inflated width of the tire (inflated tire width can vary a little depending on the width of the rim it's mounted on).
So this tire mounts on a 559mm BSD ("26er") rim, and it inflates to around 1.5" wide, which is about 38mm.
The "26" is a marketing term very roughly based on the diameter of the inflated tire, in inches. But be careful:
https://www.sheldonbrown.com/26.html
Likes For HTupolev:
#3
Friendship is Magic
Join Date: Nov 2010
Location: Sacramento, CA
Posts: 22,984
Bikes: old ones
Mentioned: 304 Post(s)
Tagged: 0 Thread(s)
Quoted: 26425 Post(s)
Liked 10,381 Times
in
7,209 Posts
...
...it's the standardized bead seat diameter. In your picture, for that size rim, it's 622. But that's a 700c rim, so the diameter is bigger.
...it's the standardized bead seat diameter. In your picture, for that size rim, it's 622. But that's a 700c rim, so the diameter is bigger.
#4
Droid on a mission
Join Date: May 2018
Location: Palm Coast, FL
Posts: 1,005
Bikes: Diamondback Wildwood Classic
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 317 Post(s)
Liked 280 Times
in
195 Posts
There are several versions of 26" tires. The 559 is diameter of the tire in mm
Here is a link that might help you understand this
https://www.modernbike.com/iso-sizes-for-bicycle-tires-and-rims
It is what I consider the most common size of 26" tires
Here is a link that might help you understand this
https://www.modernbike.com/iso-sizes-for-bicycle-tires-and-rims
It is what I consider the most common size of 26" tires
__________________
JoeTBM (The Bike Man) - I'm a black & white type of guy, the only gray in my life is the hair on my head
www.TheBikeMenOfFlaglerCounty.com
JoeTBM (The Bike Man) - I'm a black & white type of guy, the only gray in my life is the hair on my head
www.TheBikeMenOfFlaglerCounty.com
#5
Really Old Senior Member
559mm = 22"
Add a nominal 2" of tire top & bottom and you have 26".
See Sheldon-
https://www.sheldonbrown.com/harris/tires/index.html
Add a nominal 2" of tire top & bottom and you have 26".
See Sheldon-
https://www.sheldonbrown.com/harris/tires/index.html
#6
Banned
ETRTO is an international standard so tires fit rims made by someone else .. tire bead seat diameter 559-40 is another way to say which 26" x 1.5"..
#7
Mad bike riding scientist
Join Date: Nov 2004
Location: Denver, CO
Posts: 27,365
Bikes: Some silver ones, a red one, a black and orange one, and a few titanium ones
Mentioned: 152 Post(s)
Tagged: 1 Thread(s)
Quoted: 6219 Post(s)
Liked 4,219 Times
in
2,366 Posts
There are several versions of 26" tires. The 559 is diameter of the tire in mm
Here is a link that might help you understand this
https://www.modernbike.com/iso-sizes-for-bicycle-tires-and-rims
It is what I consider the most common size of 26" tires
Here is a link that might help you understand this
https://www.modernbike.com/iso-sizes-for-bicycle-tires-and-rims
It is what I consider the most common size of 26" tires
The ETRTO size would be 38-559
__________________
Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Last edited by cyccommute; 09-15-20 at 07:32 PM.
Likes For cyccommute:
#8
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,096 Times
in
742 Posts
ETRTO is the European Tire and Rim Technical Organization. ETRTO was the organization that brought standard nomenclature and defined sizes to the chaos of bicycle wheel and rim sizing in the past. A while ago the International Standards Organization (ISO) took over the job of defining bike wheel standards from ETRTO so you will see bike wheel sizes stated as ISO sizes which are identical to the older ETRTO sizes. So an ISO 622 rim is the same as an ETRTO 622 rim.
Last edited by HillRider; 09-15-20 at 06:59 PM.
Likes For HillRider:
#9
Senior Member
Join Date: Sep 2010
Location: Roswell, GA
Posts: 8,319
Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1438 Post(s)
Liked 1,092 Times
in
723 Posts
ETRTO is the European Tire and Rim Technical Organization. ETRTO was the organization that brought standard nomenclature and defined sizes to the chaos of bicycle wheel and rim sizing in the past. A while ago the International Standards Organization (ISO) took over the job of defining bike wheel standards from ETRTO so you will see bike wheel sizes stated as ISO sizes which are identical to the older ETRTO sizes. So an ISO 622 rim is the same as an ETRTO 622 rim.
Likes For dsbrantjr:
#10
I'm good to go!
Join Date: Jul 2017
Location: Mississippi
Posts: 14,992
Bikes: Tarmac Disc Comp Di2 - 2020
Mentioned: 51 Post(s)
Tagged: 0 Thread(s)
Quoted: 6196 Post(s)
Liked 4,810 Times
in
3,318 Posts
What does 26x1.5/559 mean?
You have a tire that has that on the sidewall? Please post a pic. This will be the first time I ever will see a bicycle tire manufacturer prominently display something useful for tire size. Though not a true ISO size, it sure helps!
26" diameter ?
Outer circumference of the tire. But only very general and rough. Width of tire can very the circumference a lot. There are 26" tires that won't fit your wheel. So it's really a useless number to know. More to do with marketing and salespeople that aren't technically or engineering oriented.
1.5 tire height
Roughly, also roughly the width.
What is the 559 ?
BSD Bead Seat Diameter if you know this number you are well on your way to determining what other tires may fit your rim or what rims will fit the tire.
You have a tire that has that on the sidewall? Please post a pic. This will be the first time I ever will see a bicycle tire manufacturer prominently display something useful for tire size. Though not a true ISO size, it sure helps!
26" diameter ?
Outer circumference of the tire. But only very general and rough. Width of tire can very the circumference a lot. There are 26" tires that won't fit your wheel. So it's really a useless number to know. More to do with marketing and salespeople that aren't technically or engineering oriented.
1.5 tire height
Roughly, also roughly the width.
What is the 559 ?
BSD Bead Seat Diameter if you know this number you are well on your way to determining what other tires may fit your rim or what rims will fit the tire.