D
DougC
Guest
We've had this topic come up a couple times before--that being, when it comes to bicycle tires, there's two different sizing systems. One uses a decimal point (such as 26 x 2.125) and the other is fractional (like, 26 x 2-1/8).
Even though it would seem that these are the same, they're not. The two numbers represent the overall diameter and the width, but the bead diameters of the two systems is measured different.
I happened to run across a pretty good example of this mix-up, including what happens when you to mount a 26" x 1-3/8" tire on a MTB rim-
http://www.ffcobra.com/forums/showthread.php?t=187761
~
Even though it would seem that these are the same, they're not. The two numbers represent the overall diameter and the width, but the bead diameters of the two systems is measured different.
I happened to run across a pretty good example of this mix-up, including what happens when you to mount a 26" x 1-3/8" tire on a MTB rim-
http://www.ffcobra.com/forums/showthread.php?t=187761
~