Originally Posted by
elanamig
Question: Looking at tires at amazon, and come across something like this:
http://www.amazon.com/Cheng-Shin-C78...ity+tire+26%22
With a line in description that says : "This is NOT the same diameter as a fractional tire size such as 26" x 1 1/2"* "
What is a fractional tire size, and how does a 26" x 1 1/2" differ from 26" x 1.5"?
Thank you!
a source of endless confusion.
a 'fractional size' means a sie with a fraction like x 1-1/2 as opposed to decimal like 1.50 .... 26" 'fractional' tires fit a completely different rim size such as were used on old english 3-speeds. see
http://sheldonbrown.com/tire-sizing.html for the gory details. the ISO size is the safest way to go. 26 decimal sizes are xx-559 (where xx is the tire width in mm, like that rando pro I mentioned is a 40-559). 26" fractional sizes can actually be any of 3-4 different rim sizes, which is a real mess.
btw, Cheng Shin tires are the cheapest of the cheap. they range from barely OK to really awful. that tire probably weighs twice what the rando pro does in the same size.