Old 02-28-20, 11:56 AM
  #4  
bikemig 
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27 inch will be closer in size to 700b than 700c. The ISO on 27 inch is 630; for 700b it's 635.

This is useful:

https://www.sheldonbrown.com/tire-sizing.html

Last edited by bikemig; 02-28-20 at 12:01 PM.
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