Thread: Tires Explained
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Old 10-02-13 | 06:57 AM
  #11  
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jrickards
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Originally Posted by gna
I'd start with St. Sheldon:
http://sheldonbrown.com/tire-sizing.html

Essentially, 700C is a size, with a 622 bead seat diameter. 38mm is how wide the tire is.
My 700Cx35 Schwalbe Marathon has an ERTO of 37-622 which suggests that the 35mm tire (700Cx35) is actually 37mm tall (ERTO 37-622) which is apparent when you look at the tire because it has a slight aero-shape whereas my Michelin Pilot Sport (700Cx32) appears round and the ERTO bears it out, 32-622.
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