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Old 02-03-21 | 08:21 AM
  #34  
Tourist in MSN
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From: Madison, WI

Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.

The key point of my comment was:

Originally Posted by Tourist in MSN
I do not think that 26 X 1 3/8 is 650C, I generally find data from Sheldon to be spot on.
https://www.sheldonbrown.com/tire-sizing.html
....
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
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