The key point of my comment was:
Originally Posted by
Tourist in MSN
The rest of my comment was elaborating on experience.
To that you responded:
Originally Posted by
bwilli88
26 x 1 3/8 is not 650b but 650c
Since you felt that the data Sheldon posted was in error, this is another source.
https://www.biketiresdirect.com/tire-size-chart-article
It lists 26 X 1 3/8 as 590mm, which it also lists as 650a. And it lists 650c as 571mm