26 Zoll Fahrradreifen: Unterschied zwischen den Versionen

26 x 1 3/8 Schwinn

Bicycle tires come in a bewildering variety of sizes. To make matters worse, in the early days of cycling, every country that manufactured bicycles developed its own system of marking the sizes. These different national sizing schemes created a situation in which the same size tire would be known by different numbers in different countries. Even worse, different-sized tires that were not interchangeable with one another were often marked with the same numbers!

The traditional sizing systems are based on a measurement of the outside diameter of a tire. This would usually be measured in inches (26", 27", etc.) or millimeters (650, 700, etc.).

A second number or letter code would indicate the width of the tire. (26 x 1.75, 27 x 1 1/4...650B, 700C...)

Note that the inch-based designations sometimes express the width in a decimal (26 x 1.75) and sometimes as a common fraction (26 x 1 3/4). This is the most common cause of mismatches. Although these size designations are mathematically equal, they refer to different size tires, which are NOT interchangeable. It is dangerous to generalize when talking about tire sizing, but I would confidently state the following:

The modern ISO/E.T.R.T.O. system indicated the size of the rim, not the outer diameter of the tire. This makes the ISO/E.T.R.T.O. system the most reliable guide to which tire will fit which rim.

If you want more detail on the arcana of Bicycle Tire Sizing, click here.   

This is the size used on most mountain bikes. It is based on a traditional American size also used on "cruisers." Generally, any tire where the width dimension is expressed as a decimal inch value will be the 559 mm size, such as 26 x 1.0, 26 x 1.5, 26 x 1.75, 26 x 1.95, etc.

   

There are actually two ISO 571 sizes:

Although these two sizes have the same bead seat diameter, the rim and tire widths are so different that they will not generally be interchangeable in practice.

   

This size is mainly a French size, and was the standard size for French utility bikes, heavy duty touring bikes and tandems for many years.

See also my Article: 650B (584 mm) Conversions for Road Bikes

   

This size was the norm for most English 3-speed bikes, and used to be very, very common. It was also used on some inexpensive 10-speed bikes in the '70s.

The 590 mm size has fallen out of fashion since the advent of the mountain bike in the late 1970s, but there are still lots of bikes on the road that use it. It remains fairly popular in Japan.

   

The 597 mm size is mainly seen in the U.S. on Schwinn 3-speeds. The fact that Schwinn chose to call this proprietary size "26 x 1 3/8" has caused an incalculable amount of confusion and frustration over the years.

The 597 mm size was also formerly used on high-end British "club" bicycles, with the marking "26 x 1 1/4 E.A.1" That size was pretty much abandoned in Britain in the late 1950s, when the 630 mm (27 inch) size replaced it.

Click Here for how to measure Rim Size.

More details? Click Here for Sheldon Brown's Tire Sizing Article  

[[Kategorie:Laufradtechnik]]

[[Kategorie:In Arbeit]]